An endangered species is a plant or an animal that faces a high risk of disappearing forever. Sometimes this happens because they have lost their natural habitat, at other times humans are the cause for such species becoming extinct. Among the most endangered species are tigers, rhinos, elephants, as well as tropical plants and trees.

Contents (18 pages)

• Introduction
• Why species become extinct
• Protection
• Some of the world’s endangered animals
• Endangered plants
• The World Wildlife Fund
• Exercises
• Word list
• Key

Endangered sea turtle
Image: 303sstevens, CC BY-SA 4.0 ,
via Wikimedia Commons

Weather is the state of the atmosphere in a certain place at a certain time. Climate refers to the weather conditions of a region over a longer period of time.

Contents (26 pages)

• Introduction
• Elements of the weather
• Global wind systems
• Air masses
• Climate zones
• Weather forecasting
• Extreme weather
• Exercises
• Word list
• Key

Image: OpenClipArt , Public Domain

Air pollution, as we know it today, started with the Industrial Revolution in Europe in the 19th century. In the last few decades, it has become the major problem for our environment.

Contents (23 pages)

• Introduction
• Major pollutants and where they come from
• Acid rain
• What we can do about air pollution
• Smog
• Exercises
• Word list
• Key

Image: Smog island Taiwan, FreeSVG, Public Domain