Coal emissions restrictions were challenged by courts, but coal companies began lowering their emissions when the rule were put in place in 2015. They dropped something around 30% over 2015 - 2016. Obama’s EPA also enforced the clean air act at levels higher than previous admin.
The air quality panel was dissolved. I’ve read statements by one of the EPA lawyers protected by her union status accusing the EPA director of actively ignoring standards for business. The number of cases overrhe first 266 days were down by 1000 compared to the big O. Several city councils have initiated complaints with the EPA over industry violations and cases have not been opened. Over 1600 employees have left the EPA since Trump made his appointment of Pruitt, most citing their inability to help the environment at the EPA under the new leadership.
We should be seeing a gradual drop in numbers, not an increase, due to things like hybrid/electric car ownership increasing. To be sure Trump is putting more people to work, and coal output increases under a good economy — so surely there is an adjustment for a good economy. But it (along with the increase in natural factors) doesn’t account for the overall increase of Toxicity.
On the state level, they are overwhealmed (from what I’ve read). They are required to enforce many EPA cases at a very high percentage, and are financially limited already. In 2011, this was an issue, it has only gotten worse. States like Jersey and California are airing for lack of action by the EPA on coal.
This simply my opinion, but the Paris deal allowed for a financial benefit delivered from well developed nations (like the US) to developing nations and under developed nations to take action themselves. It was an international commitment. It was a way to say we are in this together, and we will not limit the development of nations. To some it seemed like the US were getting hosed. To some it made sense due to the larger impact the US had on climate change over the last 100 years compared to other nations, and the role we had in creating the urgency.
Imo, the actual threat to land and animals aside, the pipelines simply allow us to continue to live under the same system that has existed for too long. We can move to energy that is sustainable and clean, if we are motivated to do so. Not only do pipelines zap that ambition, it provides (like you said) jobs in which a whole new group of Americans are dependent on unsustainable and unhealthy energy sources, which is the reason we are still talking about this approaching 2020.