What are the two major concerns over using fossil fuels for energy? a. they cause pollution and are renewable. c.they require expensive equipment to use and to mine. b.they cause pollution and are non-renewable. d.they are very rare and very expensive to buy?

So the main concern is that fossil fuels are limited and they will run out at one point.(non-renewable).
The reason this is a concern is because we are so dependent on them and if we continue like this,when they run out oir economy will collapse.

The inter concern is the cpvast amounts of carbon dioxide and carbon monoxide that gets pumped out when you burn them.Rhis causes high amounts of pollution and leads to i global warming.Thses gases trap the sun’s heat and do not let go of it.
This means that the Earth gets hotter and hotter.
So the answer is B

The answer is b or dmost likely bhope it