Eggertson: It's time to go beyond Earth Hour

If we assume that most people now understand the reality of our changing climate, perhaps this is a good year to drastically change what we do during Earth Hour.
Launched in 2007, this annual ritual asks us to turn off all non-essential lighting from 8:30 p.m. to 9:30 p.m. on Saturday. The admirable gesture has raised public awareness of the need to take action on climate change — but the event is badly flawed in almost all other aspects.
First, how can there be any non-essential consumpti