How do we plan on returning coal’s CO2 to the earth?
There are a few methods of carbon capture for coal plants that have the possibility of reducing emissions by 80-90%. They involve capturing CO2 either before or after combustion of the coal and injecting it into the ground into geological formations or storing it in the sea. (The problem with putting CO2 in the sea is that it increases the acidity of the sea, harming some marine life such as shellfish.) Carbon can also be locked into mineral formations. However, if CO2 happens to leak from where it’s sequestered under ground it can cause toxic and deadly fumes harming people and animals in the area, so this is not an approach that would be without its risks.
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