Question

FILL IN THE BLANKS.

▪ _________ is an important raw material for the cement industry.

▪ _________ is the only non-conventional source of energy that is non-renewable and polluting.

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Answer 1

Answer:

• limestone, clay and marl

• solar energy

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Answer 2

Answer:

▪ Limestones

▪ Solar Energy

Explanation:

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