[Super_Jambo]

Individual actions to fix this kind of problem are pretty ineffective. That isn't to say it's not worth doing. In the US / UK with FPTP it's basically all you _can_ do voting and activism under FPTP is also pretty ineffective again worth doing but insufficient for this large a crisis.

The basic reason for this is down to markets being very very good at resource allocation. Lets imagine you're a huge beef eater and previously ate 2 cows worth per year. You reduce to zero cows. What happens?

The price of beef drops a tiny tiny bit. Other people who previously couldn't afford beef quite so often now can and increase their consumption. If a large number of people switch away from beef eventually the price reductions feed through and some farmers go bust or else reduce their production. But since the externality isn't priced in chances are _someone_ out there will consume it.

To tackle this kind of thing you need the externality brought into the pricing system. Add taxes somewhere on the chain of green house gas production. It doesn't actually matter where you tax it, could be a sales tax, could be a production tax. You can even make the tax revenue neutral and pay it out to everyone. You can tax imports to keep a level playing field...

Of course doing that would massively hit the profits of fossil fuel companies and their share holders so they're lobbying like crazy & paying millions to promote bullshit like the idea of 'carbon footprint' to stop it happening.