As Bob says in a previous post:
"My POV is that there has always been climate change but since industrialisation mankind has had an ever larger role in pushing the rate at which change is occurring. Who is polluting more is changing as the economic landscape changes. China's rapid industrial growth since the 1990s has also greatly increased the pollution they generate while other nations have reduced the amount they pollute. I doubt one cancels the other out as the earth is still warming at an ever increasing rate."
China's position is interesting. On the one hand pollution has indeed greatly increased. On the other hand China is making significant contributions to renewable energy. China sees renewables as a source of energy security. Unlike oil, coal and gas, the supplies of which are finite and subject to geopolitical tensions, renewable energy systems can be built and used wherever there is sufficient water, wind, and sun. As Chinese renewable manufacturing has grown, the costs of renewable energy technologies have dropped dramatically.