If Canada emits at 2005 levels for the next 100 years that’s 73 gigatons of CO2 emitted (730 megatons per year x 100)
Whereas if Canada reduces emissions by 17%, that’s 61 gigatons of CO2 emitted.
73 gigatons x 0.0000000000015 = 0.1095C
61 gigatons x 0.0000000000015 = 0.0915C
The reduction in warming then from a 17% reduction in Canadian emissions is 0.018C. Ie 0.0915C warming instead of 0.1095C.