Well there's two issues there.
Firstly, even IF the main threat were global warming, and even IF it is being driven by CO2 emissions, the 'action' being taken to 'combat' it is either laughable, farcical, or both if you are cynical enough. That great environmental champion bonny Prince Harry zooms off on Queen Elton's private jet, but don't worry, he/she (not sure what Elton is these days!) bought some 'carbon credits' to 'offset' it so it's OK then. I mean seriously!!!!!!, what a load of absolute shite, .............................and the majority appear to buy in to this bollocks as well.
Or what about air travel generally, estimated fuel usage globally is around 700 million litres per day, and rising rapidly. And that is purely the aviation fuel being consumed with no allowance for the fuel being burned to shift and process the fuel itself, the movement of people to and from airports related to that travel, the electricity consumption of the airports 24/7, etc, etc. And is it all necessary?..................of-course it's not. People now going on a weekend break to New York from the UK, a stag do in Prague, a couple of days in Vegas, all well and good but if you want to be serious about saving the planet, so serious that you're prepared to pontificate and bully people to get your point across, then it needs to be looked at as something which we at very least need to put a much higher value on.
Global trade equally needs a huge shake up. Ship a washing machine, microwave, toaster, kettle, whatever, half way around the world only for it to shit itself and be discarded in less than a year, then a local 'recycling' centre, and before much longer on a container back to where it started. But of-course if we weren't shipping our goods in from China, then stuff would have to be produced here, and nobody really wants to do that any more as we all go to university now and are much too important to spend a day working to actually produce something! Never mind that we can kid ourselves that we are reducing our emissions when in fact it's just that we are shutting down all the factories that made stuff while somebody else is upping their emissions to make the stuff for us!
But secondly, the planet as a whole is being polluted and stripped of it's natural resources at an increasingly accelerated pace, and while the evidence for the human contribution to climate change is at best contestable, the human contribution to these two is beyond any doubt whatsoever. Yet there is no debate taking place whatsoever along these lines as too do so meaningfully leads to issues which no one wants to face up to.