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thing that we use before, change into something else to use. Last but not least, the

recycle is we us the trash to remake the new stuff again.

Exercise 6

1. Because the healthy ecosystem will clear the water, purify the air, maintain the soil,

regulate the climate. the nature also provide the raw materials and resources for
medicine and other purpose.

2. If we stopped conserving and managing land, nature will bear a scar, but humans will

fall to extinction far before nature stops working.
3. Reduce, reuse, and recycle. Cut down on what you throw away. ...Volunteer.

Volunteer for clean-ups in your community. ...

4. If large amounts of fertilizers or farm waste drain into a river the concentration of
nitrate and phosphate in the water increases considerably. Algae use these substances

to grow and multiply rapidly turning the water green. This massive growth of algae,
called eutrophication, leads to pollution.

5. Environmental preservation is an unchanged or perfect condition without disturbing
the balance of nature while conservation is a systematic and sustainable use of natural

resources without harming living things and the environment.

6. Being in nature, or even viewing scenes of nature, reduces anger, fear, and stress and
increases pleasant feelings. Exposure to nature not only makes you feel better

emotionally, it contributes to your physical wellbeing, reducing blood pressure, heart
rate, muscle tension, and the production of stress hormones. It may even reduce

mortality, according to scientists such as public health researchers Stamatakis and
Mitchell.