Plants and us

We all know that we can't live without plants.Plants give us fresh air and we can rest under the trees in hot summer days.Many animals are our good friends and they live on plants.At the same time,plants can make our world more beautiful.It's everyone's duty to protect the plants.Then our world must be much more beautiful.
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Plants do a lot for people...they clean the atmosphere, modify climate, abate noise, inhibit glare and control erosion. In addition, many are lovely to the eye and tasty to eat.

Plants clean and purify existing air as well as manufacture oxygen. Each person requires 30 to 60 pounds of clean air to breathe each day. Ornamental plants provide clean air in four ways: First, their "manufactured" air created through photosynthesis dilutes polluted air and increases the ratio of "clean to dirty" air.

Second, moisture that plants give off traps airborne particles and acts as a filter for some p