"Countries whose efforts are woefully inadequate, and likely to see us heading towards global warming of 4°C or more (catastrophic for all life on earth), include the USA, Saudi Arabia and Russia. It is perhaps not a coincidence that these three countries happen to be the three biggest oil producers in the world. One might be forgiven for suspecting that their heart is not really in tackling climate change at all. In the case of the USA this was made abundantly clear under the Trump administration."