Over the last 20-30 years, natural gas has slowly been replacing coal, because of the carbon emissions. Now they are trying to do away with natural gas.
It is going to take years to build enough windmills and solar panels, with battery systems, to replace the coal, natural gas, and fuel oil power plants. Like 30 or more years. Then there will be areas of the country that will not have enough wind, or enough sunshine to make wind and solar, so that would have to be filled with nukes. None of the people want nuke plants.
Even Elon Musk said drilling and pipeline construction will have to continue for a while to keep the economy going as it gradually transitions. Of course, the left don't like him anymore.
I think the ultimate goal is not the transition to alternative energy, but control. The left wants total control over our lives.