Question

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Answer 1

13.
three biggest source of non-convential energy are :
Geothermal energy
Wind energy
Solar energy

14.
A natural resource is anything that people can use came from natural environment.
Example are :
Air,Iron,Coal,Wood etc..

15.
Potatoes,Maize,Wheat.

16.
A sustainable agriculture can be defined as an integrated system of plants and animals production is called sustainable agriculture.

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