Weapons of mass destruction include those that are chemical, biological and nuclear.

true
false

This would be true. Biowarfare has been common as far back as people vaulting victims of sickness over walls of enemy lands, and chemical and nuclear types of warfare, while more recent, are still considered major weapons of mass destruction.

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”