Ontario's electricity is now generated with its highest percentage of greenhouse gas-emitting sources since the coal phase-out, hitting 16% from natural gas. The Independent Electricity System Operator indicates a decline in emissions-free generation from 96% in 2017 to 84% in 2024. Nuclear power contributed 51% to the grid, with 24% from hydro. Climate advocate Alienor Rougeot has criticized the provinceâs delays in renewable energy investments, suggesting that proactive actions could have prevented the reliance on gas during nuclear refurbishments.
"I think this is one of those key moments that is extremely upsetting and yet super predictable, which is that the energy planning and the poor decisions that get made five, eight years prior to that now are starting to show up in those supply mixes."
"Outages to nuclear generation from this work combined with reduced supply from imports also resulted in gas generation's higher contribution to overall output in 2024."
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