POLLUTION

Pollution is waste that we put into the environment. It can harm plants and animals, including humans. Pollution comes from factories, and also from homes, farming, cars, ships, trucks, and aircraft. It includes smoke from fires, exhaust gases from engines, poisonous chemicals from industrial processes, rubbish such as plastic packaging, and sewage. These things pollute the landscape, rivers, lakes, seas, and the air. Noise and light can also be forms of pollution.

AIR POLLUTION

The city of Bangkok in Thailand is affected by smog – a mix of smoke and fog. It causes difficulties for people with breathing problems, such as asthma and bronchitis. Smoke from car engines, power stations, and factories is made up of waste gases, dust, and tiny particles of unburned fuel. These harmful waste gases include sulphur dioxide, nitrogen oxides, carbon dioxide, and carbon monoxide.

GREENHOUSE EFFECT

Some of the gases in the Earth’s atmosphere trap heat from the Sun. This is called the greenhouse effect, because the atmosphere works like the glass in a greenhouse. The greenhouse effect is natural, but pollution causes an increase in the gases that produce it, including carbon dioxide, water vapour, and methane.

ACID RAIN

Many trees are killed by acidic rain formed from pollutants in the air, especially sulphur dioxide and nitrogen oxides. These gases mix with water in the atmosphere to form rain that is acidic. Acid rain also kills aquatic life when it runs into ponds and lakes.

ACCIDENTAL POLLUTION

Leaks from oil tankers into the sea create oil slicks on the water surface. Where the oil reaches the shore, it covers beaches and kills seabirds.

Copyright © 2007 Dorling Kindersley

highlights

Bug Off! 6 Tick- and Mosquito-Borne Diseases
Which bug bites are dangerous? Learn about 6 diseases spread by ticks and mosquitoes, the signs and symptoms, and treatment options if someone in your family gets infected.

Find Today's Newest & Best Children's Books!
Looking for newly released books for your child? Try our new Book Finder tool to search for new books by age, type, and theme, brought to you by Galactic Hot Dogs.

Top 10 Backyard Party Games for All Ages
Looking for some fun outdoor games for your Fourth of July party or barbecue? Check out these awesome group games, from sack races to cornhole, to make your backyard a kid-friendly party spot!

Registered for Kindergarten — Now What?
Try our award-winning Kindergarten Readiness app! This easy-to-use checklist comes with games and activities to help your child build essential skills for kindergarten. Download the Kindergarten Readiness app today!

stay connected

Sign up for our free email newsletters and receive the latest advice and information on all things parenting.

Enter your email address to sign up or manage your account.

Facebook icon Facebook icon Follow Us on Pinterest

editor’s picks