What provide us with food, water, transport routes and are also used as energy source to power watermills and hydroelectric plants and animals?

Farmers put pesticides and fertilizers on their crops to help them grow better. When rain falls, it washes these pesticides and fertilizers through the soil and they end up in the rivers. These harmful substances encourage algae to grow and turn the water green, leading to _____

Farmers put pesticides and fertilizers on their crops to help them grow better. When rain falls, it washes these pesticides and fertilizers through the soil and they end up in the _____

Farmers put pesticides and fertilizers on their crops to help them ______ better.

Acid _______ is another cause of water pollution

Fumes that contain nitrogen oxides are produced from ________ exhausts

Power stations that burn ___________ produce Sulphur dioxide.

Acid rain is another cause of water pollution. Fumes that contain nitrogen oxides are produced from vehicles exhausts. Power stations that burn coal produce Sulphur dioxide. When these two substances mix with water in the air, they turn into acids, then fall as _________.

_________ damages tree and buildings and also kills wildlife in rivers.

Millions of fish and sea birds are killed when ships leak ____ into the seas and oceans

Millions of fish and sea birds are killed when ships leak oil into the seas and oceans, creating a water slick on the surface. This is called ________ pollution.

People also pollute rivers by pouring things like paint and used car oil into ______.

Hundreds of thousands of whales, seals, turtles and birds are killed every year due to ________ gear

_________ refers to any discarded, lost, or abandon fishing gear like nets in the marine environment.

_________ continue to fish and trap animals, entangle and potentially kill marine life, smother habitat, and act as a hazard to navigation.

In many parts of the world people dump toxic (poisonous) chemicals and other dangerous waste products into r_____ and s_____.

Factories often use water for cooling processes. Warm water is then discharged back into the rivers, raising the _____________ of the water and lowering the level of dissolved oxygen.

Factories often use water for cooling processes. Warm water is then discharged back into the rivers, raising the temperature of the water and lowering the level of dissolved ________.

Over 70% of the world is covered in water, but most of this is salty and not suitable for drinking. Over 1 billion people do not have access to clean drinking water.