It might be worth taking into account the fact that we are currently coming out of a mini ice age, yes maybe a little faster than expected, but it is fact.
There is a massive industry grown up around this "green" thing and I am very suspicious of a point of view that will not allow anyone to say anything counter to it.
I remember a few years ago we watched a documentary show that was very interesting. It came to the conclusion that the greenhouse effect is partly down to the fact that we no longer produce as much pollution, therefore the sunlight is getting through the atmosphere more easily. It was previously being blocked by or reflected off the pollutant particles in the atmosphere.
I am not saying that there is not global warming, but it is mostly part of the normal warm/cold/warm/cold cycle that the earth has been going through for many thousands, if not millions of years, and a lot of greenhouse gases are being given off by natural things as diverse as volcanoes and cattle.
China emitted 9040.74 million tonnes of carbon dioxide emissions in 2015, the US 4997.50, the UK 404.7, considering how industrialised the UK is compared to China and that only just under half of Chinese live in in urban areas I don't think we are doing too badly.
Oh, and one other thing. All these people going on about saving the earth? The Earth will still be here when we are gone and the next population are making their way on the planet.
Oh, and I do do all I can to mitigate my effect, but mainly because it is cheaper.