Energy in Ontario

Table 1: Total Ontario energy generation by selected fuels, and related lifecycle pollution emissions, from to 00:00 EDT on Aug 20 2017
FUEL MWh CO2, tons PM, kg NOx, kg SOx, kg
Nuclear 768 14 6 30 18
Gas 0 0 0 0 0
Wind 0 0 0 0 0
TOTAL 768 14 6 30 18
Wind + Gas 0 0 0 0 0
The combination of wind and gas generators produced 0 megawatt-hours (MWh) in the hour ending 00:00, and emitted 0 tons of carbon dioxide (CO2), 0 kg of particulate matter (PM), 0 kg of oxides of nitrogen (NOx), and 0 kg of oxides of sulfur (SOx).

Had a combination of wind and gas replaced the 768 MWh that the nuclear fleet produced, the total environmental impact would have been:
  • 296 tons of CO2
  • 15 kg of PM
  • 384 kg of NOx
  • 8 kg of SOx



Table 2: Total Ontario energy generation by selected fuels, and related lifecycle pollution emissions, from midnight to 00:00 EDT on Aug 20 2017
FUEL MWh CO2, tons PM, kg NOx, kg SOx, kg
Nuclear 768 14 6 30 18
Gas 0 0 0 0 0
Wind 0 0 0 0 0
TOTAL 768 14 6 30 18
Wind + Gas 0 0 0 0 0
The combination of wind and gas generators produced 0 MWh between midnight and 00:00 on Aug 20 2017, and emitted 0 tons of CO2, 0 kg of PM, 0 kg of NOx, and 0 kg of SOx.

Had a combination of wind and gas replaced the 768 MWh that the nuclear fleet produced, the total environmental impact would have been:
  • 296 tons of CO2
  • 15 kg of PM
  • 384 kg of NOx
  • 8 kg of SOx

Definitions

NOx: Nitrogen oxides (NOx) consist of nitric oxide (NO), nitrogen dioxide (NO2) and nitrous oxide (N2O) and are formed when nitrogen (N2) combines with oxygen (O2). NO2 directly affect a human’s health by causing acute bronchitis or pneumonia and by causing a lowered resistance to respiratory infections. Long term exposure can also cause chronic lung impairment. NO2 can also affect both terrestrial and aquatic vegetation.

SOx: SOx refers to all sulphur oxides, the two major ones being sulphur dioxide (SO2) and sulphur trioxide (SO3). The most obvious health effects are irritation and inflammation of body tissues that are contacted by the gas. SO2 can increase the severity of existing respiratory diseases such as asthma, bronchitis and emphysema. It also constricts air passages making it difficult to breathe. SO2 can also harm animals and vegetation. It also corrodes metal, causing building materials and textiles to deteriorate and weaken.

PM: Particulate matter (PM) is a complex mixture of extremely small particles and liquid droplets. PM is made up of a number of components, including acids (such as nitrates and sulfates), organic chemicals, metals, and soil or dust particles. PM can increase susceptibility to respiratory infections and can aggravate existing respiratory diseases such as asthma and chronic bronchitis, as well as heart diseases, in some cases leading to premature death.