How to read the evidence
Scientific assessments synthesise many studies. Technical explainers introduce mechanisms. Institutional sources describe their own facilities. These serve different purposes: a global assessment is not a household savings estimate, and an organisation’s description is not an independent impact evaluation.
- Scientific assessment 3 sources
- Synthesises many peer-reviewed studies; strongest basis for global claims.
- Government data & reports 5 sources
- Official statistics, inventories and dated situation updates.
- Government technical guidance 6 sources
- Agency explanations of how a technology works and what affects performance.
- Educational explainer 6 sources
- Introduces a mechanism clearly; not a quantitative assessment.
- Institutional self-description 3 sources
- An organisation describing its own facility; not an independent evaluation.
24 references found
REFERENCE [9] · Wind Energy Institute of Canada (WEICan)
Institutional self-description
Wind R&D Park (opens in a new tab)
Supports: Five DeWind D9.2 turbines rated at 2 MW each; 10 MW combined installed capacity; wind research facility. Access verified October 8, 2026.
Context and limitations: Institutional facility description, not independent environmental impact evidence. Location cross-checked against reference 11.
REFERENCE [10] · City of Summerside
Institutional self-description
Summerside Sunbank (opens in a new tab)
Supports: Announcement of energizing the facility; solar capacity 21.6 MW; battery power 10 MW and storage 20 MWh. Access verified October 8, 2026.
Context and limitations: Reported facility characteristics. Promotional emissions and household-equivalence estimates are not independently verified here.
REFERENCE [11] · Government of Prince Edward Island
Government data & reports
Renewable Energy in Prince Edward Island (opens in a new tab)
Supports: Inventory lists original Eastern Kings at 30 MW; Phase 2 at 29.4 MW, year 2025, Elmira, owned by PEI Energy Corporation. Access verified October 8, 2026.
Context and limitations: Published inventory, not live generation. Broad impact claims and other aggregate figures are not adopted as independently verified lifecycle evidence.
REFERENCE [1] · IPCC
Scientific assessment
Climate Change 2023: Synthesis Report — Summary for Policymakers (opens in a new tab)
Supports: Human-caused warming (A.1); ecosystem impacts (A.2); net zero (B.5–B.6); mitigation and trade-offs (C.3–C.4).
Context and limitations: Global assessment, not a local installation or savings forecast.
REFERENCE [2] · NASA
Educational explainer
The Causes of Climate Change (opens in a new tab)
Supports: Greenhouse gases absorb and re-emit outgoing infrared radiation; human activities increase greenhouse gas concentrations.
Context and limitations: Introductory explanation; not a complete climate model.
REFERENCE [3] · U.S. Department of Energy
Government technical guidance
How Do Wind Turbines Work? (opens in a new tab)
Supports: Wind arises from uneven solar heating, surface irregularities and Earth’s rotation; lift exceeding drag turns the rotor; the rotor drives a generator directly (direct drive) or through a gearbox; horizontal-axis turbines usually have three blades and pivot to face the wind; land-based, offshore and distributed applications. Access verified October 8, 2026.
Context and limitations: US educational context; not PEI operating data. Introductory explanation of components, not a design specification.
REFERENCE [4] · Canada Energy Regulator (CER)
Government data & reports
Provincial and Territorial Energy Profiles — Prince Edward Island (opens in a new tab)
Supports: PEI is a net importer of electricity (net inflows 1.2 TWh in 2023), sourcing about 69% of its electricity from New Brunswick through subsea cables under the Northumberland Strait; two 180 MW cables were added in 2017; emissions intensity of electricity generated in PEI was 2 g CO2e/kWh in 2022; transportation (42%), agriculture (24%) and buildings (19%) are the largest emitting sectors. Access verified October 9, 2026.
Context and limitations: Generation intensity covers electricity produced on the Island, not imported electricity. Figures are year-specific (2020–2023) and are not presented as current 2026 values.
REFERENCE [5] · U.S. Department of Energy
Government technical guidance
Solar Photovoltaic Cell Basics (opens in a new tab)
Supports: PV cells contain semiconductor material that absorbs sunlight and converts it to electricity; light energy is transferred to electrons that flow as current through metal contacts; silicon is the most common cell material; modules expected to last 25 years or more. Access verified October 8, 2026.
Context and limitations: Technology overview, not a site-specific yield forecast. Inverter and DC/AC description is general PV knowledge rather than a quotation from this page.
REFERENCE [6] · U.S. Department of Energy
Government technical guidance
Agrivoltaics: Solar and Agriculture Co-Location (opens in a new tab)
Supports: Agrivoltaics (dual-use solar) places crops, livestock or pollinator habitat under or between solar panels; active research area at DOE and USDA; potential benefits include diversified revenue, ecological advantages and reduced land-use competition. Access verified October 8, 2026.
Context and limitations: Benefits are described as research findings and possibilities, not guarantees. Not evidence of an operating PEI agrivoltaic project.
REFERENCE [17] · Natural Resources Canada
Government technical guidance
Heating and Cooling with a Heat Pump (opens in a new tab)
Supports: Heat pumps move heat from a source to a sink; refrigerant cycle components (evaporator, compressor, condenser, expansion device, reversing valve); COP example 3 kW heat from 1 kW electricity; air-source COP 2.0–5.4 at 8 °C and 1.1–3.7 at −8 °C; air at −18 °C holds 85% of the heat at 21 °C; minimum operating temperatures of many models −15 °C to −25 °C; defrost cycle and supplementary heat; savings depend on prices and climate. Access verified October 8, 2026.
Context and limitations: General homeowner guidance; performance ranges are for market-available products and vary by model and installation.
REFERENCE [18] · Natural Resources Canada
Government technical guidance
Heat Pump Basics (opens in a new tab)
Supports: Heat pumps transfer rather than generate heat; cold climate air-source heat pumps can work well below freezing, down to −30 °C; no greenhouse gas emissions from heating in the home. Access verified October 8, 2026.
Context and limitations: Promotional efficiency and emissions figures (e.g. “up to”) are not adopted as typical values here. The incentive information on this page is federal and may not reflect current PEI programs.
REFERENCE [19] · U.S. Energy Information Administration (EIA)
Government data & reports
Energy Storage for Electricity Generation (opens in a new tab)
Supports: Power capacity (kW, MW) versus energy capacity (kWh, MWh); storage systems are secondary, not primary, generation sources; they use more electricity charging than they supply; uses include balancing supply and demand, storing renewable output and back-up. Access verified October 8, 2026.
Context and limitations: US data with 2022 values; national statistics are not used on this site.
REFERENCE [20] · U.S. Department of Energy — Alternative Fuels Data Center
Government technical guidance
Emissions from Electric Vehicles (opens in a new tab)
Supports: All-electric vehicles have zero tailpipe emissions; electricity production may generate emissions; life-cycle (cradle-to-grave) emissions include fuel cycle plus vehicle and battery manufacturing, recycling and disposal; benefit depends on the electricity mix. Access verified October 8, 2026.
Context and limitations: Qualitative overview of emission categories; no quantified PEI comparison is made here.
REFERENCE [21] · Clarke, L., Y.-M. Wei et al. / IPCC Working Group III
Scientific assessment
Climate Change 2022: Mitigation of Climate Change — Chapter 6: Energy Systems (opens in a new tab)
Supports: Onshore wind capacity factor rose from 27% (2010) to 36% (2020); wind impacts concentrated in manufacturing, transport, construction and disposal, operation produces no waste or pollutants, carbon footprint repaid in under a year; bird and bat collisions; wind farms produce no electricity in calm conditions and shut down in very strong winds; variable renewables integrated through storage, transmission and demand response; minerals for turbines, PV and batteries. Access verified October 8, 2026.
Context and limitations: Global assessment with period-specific values; not a forecast for PEI or any individual project.
REFERENCE [22] · Government of Prince Edward Island
Government data & reports
Heat Pumps (opens in a new tab)
Supports: Since 2018, the province and the Government of Canada have invested $95 million to install 45,000 heat pumps; free heat pump applications closed; heat pump rebates ended April 15, 2026. Access verified October 8, 2026.
Context and limitations: Government-reported program figures, not an independent evaluation of energy or emissions outcomes. Program status may have changed after publication.
REFERENCE [23] · City of Summerside and Government of Prince Edward Island
Government data & reports
Summerside and Province provide update on Sunbank monitoring (opens in a new tab)
Supports: Following the battery fire at the Sunbank site, the situation was stable; air quality monitoring showed no evidence of health risk; drinking water tested safe; the Fire Department still treated the site as an active fire scene; a longer-term air, water and soil monitoring plan is being developed. Access verified October 9, 2026.
Context and limitations: Situation update at one date. It does not state the facility’s operating status, the cause of the fire or later developments. Also published by the Government of PEI.
REFERENCE [24] · Wind Energy Institute of Canada (Heather Norton)
Counting down to 500GWh (opens in a new tab)
Supports: The Wind R&D Park has five grid-connected 2 MW DeWind 9.2 turbines; since it began operating in 2012 it has generated more than 500,000,000 kWh (500 GWh); WEICan has trialled six leading-edge protection products, conducts long-term lubricant field tests and has deployed an ice-free anemometer at the park. Access verified October 9, 2026.
Context and limitations: Institutional retrospective by the facility operator. Cumulative generation is reported as a round threshold, not an annual figure. Photographs on the page are not openly licensed.
REFERENCE [7] · Holli Riebeek / NASA Earth Observatory
Educational explainer
The Carbon Cycle (opens in a new tab)
Supports: Carbon moves among atmosphere, ocean, soils, organisms and rocks; combustion moves fossil carbon to the atmosphere.
Context and limitations: Used for mechanisms only; historical numerical estimates are not presented as current data.
REFERENCE [12] · OpenStax (Rice University)
Educational explainer
Biology 2e — 46.2 Energy Flow through Ecosystems (opens in a new tab)
Supports: Photosynthesis, chemosynthesis and consumption as energy sources; metabolic heat loss and the second law of thermodynamics; trophic level transfer efficiency (Silver Springs ≈14.48% between first two levels); energy pyramids always upright. Access verified October 8, 2026.
Context and limitations: Introductory textbook. Silver Springs and English Channel values are case-study figures, not universal constants. Diagrams on this site are original; no textbook figures are reproduced.
REFERENCE [13] · NASA Science
Educational explainer
What Is the Greenhouse Effect? (opens in a new tab)
Supports: Greenhouse gases keep Earth warmer than otherwise; water vapour acts as a feedback; natural effect maintains about 15 °C average; removing CO2 would collapse the natural greenhouse effect, leaving the surface ≈33 °C colder (a simplified whole-effect estimate, not CO2’s direct warming alone); human fossil-fuel use has disrupted the energy balance. Access re-verified October 9, 2026.
Context and limitations: Introductory FAQ using a “blanket” analogy; it is not a quantitative energy-budget assessment.
REFERENCE [14] · NASA Science
Educational explainer
Evidence for Climate Change (opens in a new tab)
Supports: About 1 °C warming since the late 19th century; ~90% of extra energy stored in the ocean; ~20 cm sea-level rise last century; ocean absorbed 20–30% of human CO2 emissions in recent decades; US record highs increasing since 1950. Access verified October 8, 2026.
Context and limitations: Summary page; some statistics refer to earlier periods (e.g. “seven most recent years”) and are not used here as current 2026 values.
REFERENCE [15] · NOAA (National Oceanic and Atmospheric Administration)
Educational explainer
Carbon Cycle — Education Resource Collection (opens in a new tab)
Supports: Most carbon stored in rocks and sediments; ocean holds about 50 times more carbon than the atmosphere; fast surface exchange and centuries-long deep storage; fossil fuels, land-use change and concrete add CO2; ocean acidification affects shell-building organisms. Access verified October 8, 2026.
Context and limitations: Educational overview; it provides no flux quantities, and none are inferred on this site.
REFERENCE [16] · Chen, D., M. Rojas, B.H. Samset et al. / IPCC Working Group I
Scientific assessment
Climate Change 2021: The Physical Science Basis — Chapter 1: Framing, Context and Methods (opens in a new tab)
Supports: GMST 2011–2020 was 1.09 °C [0.95–1.20] above 1850–1900; CO2 285.5 ppm (1850) to 409.9 ppm (2019); GMSL rose 0.20 m (1900–2018); net-zero GHG halts human-induced warming while net-zero CO2 approximately stabilises CO2-induced warming; temperatures remain elevated for centuries. Access verified October 8, 2026.
Context and limitations: Global framing chapter. Historical values are period-specific and are not current 2026 measurements; regional and local outcomes differ.
REFERENCE [8] · WEICan
Institutional self-description
Wind Energy Institute of Canada — Research and Development (opens in a new tab)
Supports: The institute describes an operating 10 MW Wind R&D Park and wind, solar and meteorological research.
Context and limitations: Primary institutional self-description, not an independent impact evaluation. Specific older facility URLs were unavailable.
A LITTLE LESS JARGON
The cleantech glossary
Clean technology
Products, processes and services intended to reduce environmental impacts compared with an alternative. [1]
Biodiversity
The variety of living organisms, including diversity within species, between species and across ecosystems. [1]
Carbon cycle
The movement of carbon between the atmosphere, living things, soils, oceans and rocks. [7]
Net zero CO2
A balance between human-caused carbon dioxide emissions and human-caused carbon dioxide removals over a specified period. [1]
Energy efficiency
Providing a useful service with less energy input, such as heating a building while reducing energy demand. [1]
Photovoltaic
A technology that converts sunlight directly into electricity using semiconductor materials. [5]
Agrivoltaics
Co-locating solar electricity generation with agriculture, such as crops or grazing. [6]
Greenhouse gas
A gas that absorbs and emits infrared radiation, slowing the loss of heat to space. [2]
Trophic level
An organism’s feeding position in a food chain, such as producer, primary consumer or secondary consumer. [12]
Energy flow
The one-way movement of energy through an ecosystem, from sunlight to producers and consumers, and out as heat. [12]
Climate feedback
A process that responds to a temperature change and amplifies or dampens it, such as increasing water vapour in a warmer atmosphere. [13]
Radiative forcing
A change in Earth’s energy balance caused by a factor such as greenhouse gases or aerosols, measured in watts per square metre. [16]
Carbon sink
A process or reservoir that removes carbon dioxide from the atmosphere, such as growing forests or the ocean. [15]
Net zero greenhouse gases
A balance between human-caused emissions and removals of all greenhouse gases, compared using conversion metrics, over a specified period. [16]
Mitigation
Reducing greenhouse gas emissions or enhancing sinks to limit climate change. [16]
Capacity factor
Actual energy a generator produces over a period divided by the energy it would produce running at full rated power for the whole period. [21]
Coefficient of performance (COP)
For a heat pump, useful heat delivered divided by electrical energy consumed under specified conditions. [17]
Power capacity and energy capacity
Power capacity (kW, MW) is the maximum rate of output; energy capacity (kWh, MWh) is the total amount a storage system can store or discharge. [19]
Life-cycle emissions
Emissions across a product’s whole life, from material extraction and manufacturing through use to recycling or disposal. [20]
Adaptation
Responding to actual or expected climate impacts to reduce harm or take advantage of opportunities. [16]
VISUAL TRANSPARENCY
Media and illustration register
Every photograph is a real, openly licensed image from Wikimedia Commons, credited below with its creator, licence and any changes made. Photos taken outside PEI are labelled as such and illustrate a technology in general, not a particular Island facility. Original diagrams are conceptual teaching aids with text equivalents and source links.
north-cape-coast-hunkeler.webp
Creator: Chris Hunkeler (Carlsbad, California), 3 September 2018. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:North_Cape_Wind_Farm,_PEI_(49681030637).jpg. Use: /, /pei. CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/); Resized to 2400 px wide and converted to WebP. Adaptation shared under CC BY-SA 2.0.. Status: Location as titled on Wikimedia Commons. Individual turbines are not identified, and the photo is not confirmed to show WEICan’s Wind R&D Park..
north-cape-wind-larry.webp
Creator: Larry (Charlottetown, PEI), Not stated on source. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:North_Cape_Wind_Farm,_PEI_(27736815083).jpg. Use: /pei. CC BY 2.0 (https://creativecommons.org/licenses/by/2.0/); Resized to 1600 px wide and converted to WebP.. Status: Location as titled on Wikimedia Commons. Individual turbines are not identified..
north-cape-fields-mike.webp
Creator: Mike (United States), 2006. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:North_Cape_Wind_Farm.jpg. Use: /, /pei. CC BY 2.0 (https://creativecommons.org/licenses/by/2.0/); Resized to 1600 px wide and converted to WebP.. Status: Location as titled on Wikimedia Commons. Historical photograph; individual turbines are not identified..
heat-pump-snow-peter-eastern.webp
Creator: PeterEastern, Not stated on source. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Ecodan_outdoor_unit_in_the_snow.jpg. Use: /technologies/heat-pumps. CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/); Resized to 1600 px wide and converted to WebP. Adaptation shared under CC BY-SA 4.0.. Status: Generic air-source heat pump outdoor unit. No product endorsement is implied..
north-cape-turbine-sky-larry.webp
Creator: Larry (Charlottetown, PEI), 19 May 2018. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Wind_turbine,_North_Cape,_PEI_(40411443920).jpg. Use: /, /technologies, /technologies/wind. CC BY 2.0 (https://creativecommons.org/licenses/by/2.0/); Resized from 4608 px to 1600 px wide and converted to WebP.. Status: Location as titled on Wikimedia Commons. The individual turbine and its operator are not identified..
ground-solar-grendelkhan.webp
Creator: Grendelkhan, 27 August 2016. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Ground_mounted_solar_panels.gk.jpg. Use: /, /technologies. CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/); Resized from 6000 px to 1600 px wide and converted to WebP. Adaptation shared under CC BY-SA 4.0.. Status: Described on Wikimedia Commons as ground-mounted panels in Storrs, Connecticut. Used only as a general example of solar photovoltaics..
heat-pump-install-vernon.webp
Creator: Vernon Air Conditioning, Plumbing & Electrical Services, 27 April 2021. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Heat_Pump_Installation_(51323299230).jpg. Use: /, /technologies. CC BY 2.0 (https://creativecommons.org/licenses/by/2.0/); Resized to 1400 px wide and converted to WebP.. Status: Generic residential heat pump installation. No product, brand or installer endorsement is implied..
eastern-kings-clearing-soloviev.webp
Creator: Quintin Soloviev, 4 September 2024. Source: Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Eastern_Kings_Wind_Farm,_Prince_Edward_Island.jpg. Use: /pei. CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/); Resized from 3840 px to 1600 px wide and converted to WebP.. Status: Described on Wikimedia Commons as the tree-clearing site for the proposed Eastern Kings Wind Farm. The project sign is visible. It does not show completed turbines..
No AI-generated images are used on this site. Video credits and the full licence details for each photograph are on the media credits page.