That's because international law is largely a fiction. Sovereign nations can't be made to do anything except if threatened with economic sanctions or a war. As

That's because international law is largely a fiction. Sovereign nations can't be made to do anything except if threatened with economic sanctions or a war. As you point out yourself, emissions by the United States are declining (and, broadly, the trend continued under Trump, indicating this is an economically viable, rather than regulatory, decline), but when you let the largest emitter by far to continue spewing more than 2x the US CO2 into the atmosphere, there's very little we can do about CO2 for the planet as a whole. In fact their 2018 grew at the fastest rate in the preceding six years. https://www.theguardian.com/environment/2018/dec/05/brutal-news-global-carbon-emissions-jump-to-all-time-high-in-2018 https://www.theguardian.com/environment/2018/dec/05/brutal-n...