Of all the waste we generate, plastic bags are perhaps the greatest symbol of our throwaway society. They are used, then forgotten, and they leave a terrible legacy.

A pound invested in energy efficiency buys seven times more energy solution than a pound invested in nuclear power.

Sense About Science is much more than an innocent fact-checking service. It is a spin-off of a bizarre political network that began life as the ultra-left Revolutionary Communist Party and switched over to extreme corporate libertarianism when it launched 'Living Marxism' magazine in the late eighties.

We always hear from newspapers that while people understand the environmental challenge, they are unwilling to stomach the solutions. The trouble is, we only ever hear about the solutions from the media, and for whatever reason, they are almost always caricatured beyond recognition. If there's no appetite for green, it's not surprising.

Green policy is about triggering a shift to a cleaner way of doing things. To be effective, it needs to incentivise the right behaviour, for example through tax breaks, and that needs to be paid for by disincentives on polluting behaviour.

If you tell people, 'that old banger of yours, we're going to tax the hell out of it,' they'll rightly tell you to get lost. But if you tell people that when they next buy a car, the tax will be adjusted so that the cleanest ones will cost less and the polluting ones will cost more, most people would say 'fair enough.'