The environment is an awesome way for people to virtue signal how much they care. But the fact is the real world consequences of what most environmentalists ask for would seriously affect the way of life they have. Politicians know this. Any serious attempt to change anything will not get you votes and out of government.
That is not the governments fault. That is not the corporations fault. That is every individuals fault who talks the talk but doesn't walk the walk. How is a politician supposed to do anything about the environment when it WOULD make the poor poorer?
Most people don't realise that the effects of the 2008 financial crisis is nothing compared to what sort of reduction in living standards you would need to get even close to being carbon neutral. In fact, its usually environmentalists complaining about inequality and cost of living.
What would being carbon free mean for anyone individually? No flying, no cars. Buying solar panels. Insulating your home. No meat. No imported foodstuffs. How much sacrifice and cost is that for 1 person? Multiply that by everyone, it's INSANE.