Answers section
Questions 4.6.3(c)
Suggest what should be done to protect the environment from further damage by nitric (V) acid and oxides of nitrogen.
Answers to Questions 4.6.3(c) 
Apply lime to neutralize the acidity of the soil.
Recycling and purifying industrial wastes before releasing them into rivers and other water bodies.
Convert all harmful substances to safe and environmentally friendly products.
Prevent leakage of harmful oxides to the air.