Each line in this chart of global average temperatures represents a year from 1850 to 2017. The difference between the darkest blue and deepest red is 1.35 C. (Ed Hawkins)Inspired by this, CBC News made similar charts for several Canadian cities using data from Environment and Climate Change Canada. Usually when scientists communicate rising temperatures due to climate change, they use a line graph. Even though cities may show different patterns, greenhouse gas concentrations are fairly uniform around the globe, according to Environment and Climate Change Canada. Using the same colours for different cities, each with its own climate, gives the impression that changes are comparable.

Source: CBC News September 16, 2018 07:52 UTC