I am surprised that contributors are arguing about this.
Just have a look at Sir David Attenborough's latest TV program on the BBC, this should be compulsory viewing for all the 'flat-earthers and head-buriers' on the planet. Schools and young people should also include this in environmental education.
I think that the 'non-believers' could also investigate why we are reading headline articles on the BBC entitled "Why is the US so bad at recycling?", (major US cities suspending their recycling programs because they can no longer offload rubbish to China now). Similarly, a program highlighting pollution on the island of Aldabra in the Indian Ocean shows the plastic pollution generated by African countries, the Indian sub-continent and the islands of Indonesia (tortoises eating plastic waste and green turtles unable to lay their eggs on beaches polluted with plastic flotsam). If you don't believe this then watch the programs.
Please do not think that I am pointing the finger at any particular nationalities, these examples quoted are what is being highlighted currently. I am well aware of our own failings on this side of the Pond in the UK and in Europe. Extinction Rebellion have been pretty active in the last few weeks in the UK. Naturally, the silence from politicians and civil servants in Whitehall and Brussels is deafening now. Big Business can stop looking in the other direction as well.
So, I hope that you will forgive this rant, but please stop the arguing & arm-chair pontificating. Start addressing what we as individuals can do now - in the short term, the medium term and the long term. Start formulating one day, one week, one month, one year, 5 year, 10 year, 50 year plans with the politicians (or without them).
Just do it! Or am I just preaching to the converted?