Fossil fuels are normally stored in a reservoir deep in the earth. the carbon in fossil fuels, including coal and oil, are essentially locked out of the natural carbon cycle due to their location deep in the earth. humans have found a way to access and utilize this carbon. identify a risk for accessing this carbon. scientists conclude that excess carbon will reduce the need for other nutrient cycles. scientists feel that the extra carbon will assist in plant growth. scientists are not sure if the atmosphere can handle all of the excess carbon.

on edg its C

Explanation:

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.