Answer:
Indoor air pollutants:
1) Household items such as paint, carpet, and furniture release VOCs
2) Cigarette smoke causes significant health problems
3) Outdoor pollutants such as radon gas can also find their way into our buildings
4) Some cooking methods in developing countries contribute significantly to indoor air pollution
Outdoor air pollutants:
1) Emissions from cars
2) Smokestacks from factories
3) Natural sources like forest fires, dust storms, and volcanoes
4) Pesticides sprayed on crops becoming airborne
Hazardous waste:
1) Nuclear reactor waste from Nuclear power plants
2) Water that has been used in fracking
