1. Human Impact

2. Human Activity Human activity can affect ecosystems in 3 ways:
Pollution
Conservation
Waste management

3. Pollution
Pollution is any human addition (contamination) to a habitat or the environment that leaves it less able to sustain life
It is the most harmful human impact and affects air, fresh water, sea, soil and land
Chemicals of human origin that harm the environment are called pollutants

4. Types of Pollution Industrial/Air Pollution Agricultural Pollution
– slurry, if it gets into a river/pond
Types of Pollution
Domestic Pollution
River/Water Pollution

5. Pollutants Pollutants are produced by human activities
Some pollutants are normally present in an environment
Other pollutants never exist in an environment
CO2 from respiration vs. excess CO2 from burning fossil fuels
SO2 from marshes & volcanoes vs. SO2 from factory chimney

6. If I Can’t See It, It’s not there Right?
Acid rain is produced by human activity pollutants
Ex. automobiles
Nitrogen and sulphur-containing pollutants enter atmosphere
Combine with water vapour to form acids
Can affect soil, vegetation, lakes, rivers, and animals
Can damage leaves, roots, earthworms, shellfish, soil
Acid rain can damage the waxy coating that protects leaves from infections
Acid can seep into soil and damage roots of plants
Burns skin of earthworms
Increase acidity of soil and water
Affect shellfish because dissolves shells

7. How Can My Lifestyle Affecting the Environment?
Brainstorm how each of the following can affect abiotic and biotic factors within an ecosystem
Constructing new roads and buildings
Hydro power plants
Consuming and manufacturing goods

9. Homework
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