What is meant by
What is aeration?
How does Horizon C layer form?
What is soil pollution?
Why soil is important?
Which Horizon is known as sub soil?
What types of substances are found in 2nd layer?
What is the PH of neutral soil?
Why it is important to conserve natural fuel?
What is the formula of methane?
The water holding ability of clay.
Economic importance of liquid fuels.
What is radioactive substance?
The uses of nuclear technology
Use of Nuclear Power Plant in electricity production?
How soil pollution occurs by radioactive substances?

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