Answer: It just does.
Explanation: Over time the transfer of energy changes over time because of different things.
If you can connect air pollution leads to global warming and thus climate change.
So in order to decrease pollution levels
1. Lessen the usage of vehicles (motorised)
2. Industrial waste should be treated properly before releasing into the atmosphere
Really bro just google it
Activation energy - is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.