The main cause of acid rain is A. Burning of Fossil Fuels
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Memory would be a good answer, but I'm quite uncertain :/
Answer:
Option A
Explanation:
Most of the human economic systems if not all operate with the human natural systems. Human economic system and natural systems almost dependent on one another in that they are linked by a network of interconnected processes; for example, human economic activity depend on natural, including a maintained system of primary productivity such as forests and agriculture etc.
