The New Childrens Encyclopedia

What is the greatest threat to Australia’s coral reef? Find out on pages 76–77

Only simple organisms, such as algae, can survive in the Dead Sea since it is so salty.

Bacteria live in the mud of the Mariana Trench,

3 ⁄ 4 miles (11 km) under the sea.

Tropical rain forests get more than 70 in (180 cm) of rain a year.

Antarctica is the driest and coldest desert in the world.

Grassland covers more than half of Earth’s land surface, but most is used for farming.

What important role do fungi play in a forest? Find out on pages 66–67

ENVIRONMENTAND ECOLOGY

ENVIRONMENT

AND ECOLOGY