Heather Mallick is right on by pointing to the problem with air conditioning, which insulates many of us from the reality of climate change. How much faster would we see climate action if our politicians had to work outdoors or struggle to sleep in a sweltering apartment! For hundreds of millions of people around the world climate change — and temperatures above 40C — is a matter of life and death, instead of a careless adjustment to the thermostat.

Albert Koehl, Toronto