Our Environment: Everything You Need to Know

Our Environment: Everything You Need to Know — page 5
1 WATER All living things are made mostly of water Humans are about 60 percent water Plants are 80 to 85 percent water And the Earth’s surface is 70 percent water That’s why the Earth is called the blue planet Where Is the Earth’s Water About 97 percent of the Earth’s water is salt water which is found mainly in the seas and oceans It’s too salty to drink or use to irrigate crops Only 3 percent of the water on Earth is fresh water so it is a rare and precious thing We use fresh water to irrigate our farmland and gardens and we also treat it to make it safe to drink or potable