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Green Gyan
Trees are the tallest of all plants in the world and they were
present on the earth much before human beings appeared.
Trees grow on mountains, along seashores and in hot deserts.
We find them growing along the edges of roads, in fields and in
our homes and gardens. All plants and trees are necessary for
life on earth as they provide oxygen that living beings need to
survive.
Most plants have a green colouring matter in their leaves called
chlorophyll. During the day, when sunlight falls on the leaves,
the leaves prepare food for the plants by a process called
photosynthesis. They do this with the help of the water absorbed
by the roots, the carbon dioxide from the air that enters the
leaves through tiny pores on the surface of the leaf, and
sunlight. Oxygen is let out into the air as a result of
photosynthesis.
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