Speaking of Earth Hour, one of the proponents' consciousness-raising issues is deforestation.
The claim is that about 29 square miles of forest are lost in South America each year, but it sounds a lot bigger if you say it in hectares.
No comparison on the environmentalists' sites about the relative benefits at the local level, of forest land versus farm land. But then, farm land might produce food, and food might be for people, and people = not nice. If you're an environmentalist joiner.
Also no comparison given between "deforestation" and, oh, let's say wildfires. An average wildfire season in the United States alone consumes over 300 times more forest than the annual deforestation claim made by the World Wildlife Wrestling Federation or whatever they are. Just sayin'.