Answer:
Air pollution
Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog. Some air pollutants are poisonous.
Possible solutions:
- Burn less coal. Pollution from burning all fossil fuels is harmful to the atmosphere. But, burning coal has a larger impact on air pollution than burning oil or gas because it releases more carbon dioxide, sulfur dioxide, and heavy metal pollutants per unit of energy. Also, over one-third of the electricity produced in the world comes from burning coal.
- Lessen the impact of cars. Cars and vehicles create exhaust full of carbon dioxide, nitrogen dioxide, and other pollutants. Driving less, in favor of public transportation, biking, or walking, helps decrease air pollution.
- Conserve energy--at home, work, and everywhere! The demand for electricity, which is most often produced from burning fossil fuels, has grown exponentially over the past decades. Conserve energy by turning off lights, buy appliances rated for energy efficiency, and keep the thermostat set higher in the summer and lower in the winter. Whenever possible, invest in renewable energy sources to power your home.
