President Biden is taking aim at more than 100 Trump-era environmental deregulatory actions, but it could be many months before any of those targets are dismantled.

The Biden administration will have to wade through the lengthy rule-making process in order to pull back a large number of the actions it is seeking to undo. If the Biden team wants to set stricter standards, as Biden has indicated he wants to for greenhouse gas emissions from cars, oil and gas production, and power plants, it could take even longer.