What local industries pump materials into the atmosphere to create a drastic pH change in rain water?

It would cause a disruption in the balance of the environment. Animals would die off from the toxic rain water, then other animals would die due to the lack of food. This would cause a collapse in the environment's food chain. Also, the toxic rain water would kill some plants, and make other toxic. The environment would die quickly from the acidity or basic parts of the rain water.