Question

Give any four causes of air pollution ?

Answer 1

The effects of air pollution are notconfined to the atmosphere. Air pollution containing sulfur dioxideand nitrogen oxide causes acid rain, which in turn pollutes aquaticresources and soils. Air pollution is responsible for a host of other ills including ozone depletion, smog and impaired indoor air quality. Some causes of air pollution are beyond your control. Other sources can be managed through changes in your lifestyle.Power PlantsThe U.S. Department of Energy estimates that fossil-fuel burning power plants supply almost two-thirds of the nation's electricity needs. Natural gas and coal make up over 90 percent of this amount, according to the U.S.Energy Information Administration. Fossil fuel emissions contain the major greenhouse gases, including carbon dioxide, methane, nitrous oxide and fluorinated gases.AdvertisementVehicle EmissionsVehicle emissions are another source of fossil fuel emissions and air pollution. Private transportation accounts for about 10 percent of your carbon footprint, or the amount of carbondioxide your lifestyle and activities contribute to the atmosphere, reports Carbon Footprint Ltd.IndustryIndustry is a major contributor to air pollution. Industrial processes release pollutants such as nitrous oxide and hydrofluorocarbons into the air. Agricultural practices, livestock rearing and landfills alsocontribute to atmospheric methane concentrations. The overall effect is an increase in the global warming potential.AdvertisementDeforestationDeforestation affects the atmosphere in several ways. Forests act as sinks for carbon dioxide through a process called carbon sequestration. Trees store carbon dioxide in their plant tissue as they take in this gas to undergo food-making. In effect, this action removes carbon dioxide from the air. When forestsare burned and destroyed, this storage area for carbon dioxide is removed, increasing the concentrations of atmospheric carbon dioxide.

Answer 2

Smoke released from vehicles and industries
Burning of forests and fossil fuels
Volcanic eruptions
forest fires
CFC's released from our household appliances
Gases released during metal smelting..