Natural gas is regulated some places. Texas, California and other states do. But some states are very lax and the authority to regulate that on private land falls to the states. Obama implemented regs on federal lands where he had the authority, but Trump undid it.
How about sulfur?
They determined long ago that the sulfur in coal caused acid rain and global cooling so they shifted to low sulfur coal and Congress amended the Clean Air Act to regulate sulfur. Coal fired Power plants are allowed emit up to 100 tons per year of sulfur.
Along with sulfur, Congress included mercury, arsenic and other metals but that has never been implemented at the national level. But some states regulate mercury at 50 tons per year.
CO2 is not massively targeted.
Only the largest emitters are targeted. There are many sources of CO2 that are not and will not be regulated. Obama's first set of CO2 regs that he implemented in 2010 and were approved by SCOTUS in 2014 which applied to new and expanded permits affected only steel mills, cement kilns, and power plants. New permits had regulatory threshold of 100,000 tons per year of CO2. Expanded permits were at 75,000 tons/yr.
Obama's second set of CO2 regs that applied to existing permits and was called the Clean Power Plan and is still in court. It applied only to power plants.
Otherwise, the other large source of CO2 was auto and light duty truck tail pipes which were to be reduced by rising CAFE stds
There are no boring pollutants and many are regulated. The smog gasses which are NOx and VOCs are regulated at 250 tons/yr. Ozone it self is regulated at 75 ppm and if your locale exceeds that, you have to get your tailpipe tested. Chloro, Flouro, CFCs are regulated. There is a big long list of chemicals that was regulated in the 70s and congress expanded that list recently
CO2 is part of the desired outcome....
Of
“During complete combustion carbon and hydrogen combine with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). During incomplete combustion part of the carbon is not completely oxidized producing soot or carbon monoxide (CO).”
We baby boomers learned this 7th grade science.....