Human influences o landscapes

7. HUMAN INFLUENCE ON LANDSCAPES - Our natural envionment is vital to us: - Most of he world’s population lives in regions where food is grown easily. Few people live in deserts or mountains.

- We need fresh water for human consumption and agriculture - We need to breathe unpolluted air.

- Humans change their environment all the time: - They built roads and cities - Agriculture and mining transform landscapes.

- It is important hat these changes don’t cause long- term harm , we need to have a sustainable development.

7. HUMAN INFLUENCE ON LANDSCAPES ENVIRONMENTAL PROBLEMS 1.

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AIR POLLUTION: Caused by gases released by industry and traffic.

This causes problems: - acid rain - depletion of the ozone layer - greenhouse effect

2. CLIMATE CHANGE: It ‘s connected to air pollution.

Global warming will cause glaciers and polar ice caps to melt and will raise the level of the oceans.Desertification will increase.

3.VEGETATION: We cut down millions of trees every year.

Deforestation causes soil erosion and a loss of biodiversity It may cause desertification.

4. WATER: - Pollution of rivers and lakes affect agriculture and livestock.