Take the Earth Hour challenge
How much does an hour weigh?
Last year, Sydney, Australia, proved that an hour could be 25,000 tonnes. That's how much carbon dioxide the residents of Sydney kept out of the Earth's atmosphere by turning off their lights for just 60 minutes, in a country heavily reliant on coal.
Now, the Star is issuing a challenge – to ourselves and to our readers – to commit our city to one hour of darkness.
We are working with the World Wildlife Fund Canada to bring Earth ...
