Who’s to blame for a problem like climate change?

Ten years ago, it was low energy light bulbs that we used to deflect our responsibility for climate change. Now it’s more often the rich and big business. But fault is hard to ascribe, and can stop us facing some hard truths. David MacKay, in his seminal book Sustainable Energy Without the Hot Air, punctured the light bulb mantra that “every little helps” and posited the more realistic mantra: “if everyone does a little, we’ll achieve only a little.” Changing your light bulbs and turning your TV off at the plug might reduce your emissions by 1%. If everybody does this, it doesn’t add up to a lot. We’d reduce our collective emissions by 1%. Meanwhile, these would-be eco warriors fly to Spain for a holiday. These excuses are still prevalent today. In recent weeks, Guardian readers have worried about plastic use – bags, bottles and packaging. It’s an important…