2.4 Role of Humans in Maintaining a Balanced Nature.pptx

Science Form 2

1. 2.4 Role of Humans in Maintaining a Balanced Nature

2. Effects of Human Activities on the Environment (A) Forest logging Extinction of flora and fauna species Soil erosion Greenhouse effect

3. Effects of Human Activities on the Environment (B) Industrialisation Pollution of air, water and soil Acid rain Greenhouse effect

4. Effects of Human Activities on the Environment (C) Agriculture Pollution of water due to overuse of pesticides and fertilisers Soil loses minerals due to non-sustainable agriculture

5. Effects of Human Activities on the Environment (D) Waste disposal Pollution of water and ground Flash floods Foul odour due to decaying organic waste matter

6. Steps to solve the effects of human activities on the environment? 1. Enforce laws The Forestry Department – conduct law enforcement activities Patrols in the forest areas – helicopters and having road blocks to monitor the movement of timber-carrying lorries.

7. 2. Increase public awareness Schools – Moral Education Mass media – newspapers, radio and television

8. 3. Practise Refuse, Reduce, Reuse, Recycle, Repurpose (5R) Refuse – not to use non-recyclable materials. Reduce – reduce the number of materials to use. Reuse – reuse the materials. Recycle – recycle materials. Repurpose – use the materials for other uses.

9. 4. Use biological control Avoid the use of pesticides that pollute the air and soil