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Biology 11

Outline

11

22

33

44

55 Conclusion

Citation

Overall introduction

Several reasons for supporting

Stand point

66

Picture

Overall introduction

Fossil fuel emission and the cutting of rain forests can cause serious problems ！

Stand point

It is widely believed that legislation should be introduced to reduce fossil fuels emission and the cutting of rain forests.

As far as we concerned, we agree with the idea.

The cutting of rain forests

Fossil fuels emission

The formation of climate change

Supporting Details

11

Problem of acid rain22

Disturb the balance of ecosystem

33

44

Desertification

Climate change

• Climate change is the caused by the effects that human bring.

• Climate change is caused by factors such as biotic processes, variations in solar radiation received by Earth, plate tectonics, and volcanic eruptions.

Acid rain

• Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH).

Acid Rain

• Acid rain is caused by the pollution of fossil fuels.

Acid rain

Adverse effect

Soils

Human healtheffects

Surface waters and aquatic ani-mals

Plants damaged

Other adverse effects

Acid rain

Desertification

• Desertification is a type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife.

• It is caused by a variety of factors, such as climate change and human activities.

• Desertification is a significant global ecological and environmental problem

Desertification

The effects to ecosystem

• The definition of ecosystem is a community of living organisms in conjunction with the nonliving components of their environment , interacting as a system.

• You can see that ecosystem is very impotant to us.

Conclusion

• Overall , our conclusion is that fossil fuels emission is bad to our ecosystem. We think legislation should be introduced to reduce fossil fuels emission and the cutting of rain forests.

Citation

• "Acid rain" wikipedia.org. 6 Nov. 2013. Web. 6 Nov. 2013.

• "Desertification" wikipedia.org. 24 Oct. 2013. Web. 6 Nov. 2013.

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