2. Group the words. Natural Phenomena People Wildlife Habitats Ecology Weather Sunlight, climatic changes, plain, clear, monarch, reptiles, rainbow, ruler, wet, poison, insects, shower, misty, ozone layer, savannas, rainstorm, picnicker, changeable, coast, waste, mammals, dump, area, pigeons, disaster, weatherman, cool, residence, pollution, cloudy, meadow, valley.

1 Nowadays, albums are released on CDs.
2 The CD was developed in the 1980s.
3 CDs are used to store music or computer software.
4 CDs are made from plastic and aluminum.
5 Billions of CDs have been sold in the last twenty years.
6 Maybe one day all music will be downloaded from the Internet.
7 But probably CDs will be bought for a few years to come.

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1 Three languages are spoken by them in Switzerland.
2 The FIFA World Cup was once stolen by thieves.
3 Penicillin was discovered by Alexander Fleming.
4 Everest has been climbed by about 1,500 people.
5 The Nobel Peace Prize is awarded by them every year.
6 Water on Mars has been discovered by them.