Zusammenfassung der Ressource
Environmental problems
- Global warming
Anmerkungen:
- Global warming is coused by the greenhouse effec. Carbon dioxide and other gases trap the sun's heat.
- The ozone layer
Anmerkungen:
- The ozon layer is layer of gas high above the surface of the earth that helps to protect it from the sun's ultraviolet radiation.
- Deforestation
Anmerkungen:
- In recent years, large areas have been destroyed, as the trees are cut down for wood or burned to clear the land for farming.
- Pollution
Anmerkungen:
- Factories, power stations and motor vehicles pump large quantities of carbon dioxide and other gases into the air.
- Alternative energy
Anmerkungen:
- Solar power is a way of using the sun's energy. We can also use wind- power by building modern windmills. There are several types of water-power.
- Recycling
Anmerkungen:
- Recycling is the processing of used objects and materials so that they can be used again.