Emissions from sources such as factories, gasoline engines and other poisonous waste materials combine with the H2O or moisture in the clouds that form rain. When it mixes, it becomes acidic and falls to earth, getting in all freshwater sources that we need for drinking, providing nourishment for plant life and the other foods that we consume. It disturbs the Echo cycle and creates havoc with the whole revolving process of replenishing water hat has been evaporated by sunlight. The whole life process is greatly handicapped by dumping poisonous wastes and burning and chopping down huge forests that serve as a sanctuary for millions of creatures dependent upon these resources. The major currents are affected and some are reversing their courses causing big changes in weather and fish that have followed the same channels for eons.Every living creature is affected severely by acid rain, and its poisonous effects on us all may well lead to our demise, if we are not more vigilant.