emits 26 per cent of Canada's greenhouse gases largest source of greenhouse gas emissions in Canada emits 26 per cent of Canada's greenhouse gases grown by 42 percent In Canada, the largest share of emissions grown by 42 percent emits 26 per cent of Canada's greenhouse gases greenhouse gas emissions emits 26 per cent of Canada's greenhouse gases greenhouse gas emissions emits 26 per cent 63 megatonnes of carbon-dioxide equivalent in 2015 63 megatonnes of carbon-dioxide equivalent in 2015 emits 26 per cent of Canada's greenhouse gases