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

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 Twitter icon Follow Us on Pinterest

editor’s picks

highlights

Join BIC on our mission to save handwriting and Fight For Your Write! Writing helps kids become better readers, boosts their confidence and sparks their creativity. Visit BICFightForYourWrite.com to sign our petition to save handwriting!

7 Tips for Reading Aloud to Babies & Toddlers
The AAP advises reading aloud to babies and toddlers because it boosts brain power and has many other benefits. Get some tips for making the most of story time with your tot!

Kindergarten Readiness App Wins Gold
Our Kindergarten Readiness app won the Gold Award of Excellence in the educational category at the 2014 Communicator Awards. This valuable checklist comes with games and activities to help your child practice the essential skills she needs for kindergarten. Download the Kindergarten Readiness app today!

How to Survive Summer Boredom
When the kids are home all day, every day, summer boredom strikes hard and fast. Learn the best summer boredom busters and tips for surviving until September.

12 Birthday Party Favors that Won't Get Thrown Away
The next time you're planning a birthday, forgo the penny candy and cheap toys. Send your guests home with one of these fun and creative party favor ideas!