Which of the following is not a commercial source of energy?
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Chlorophyll was first isolated and named by
Mars is the _______ planet from the Sun.
ABM stands for ______.
Which is the highest quality of hard coal?
Which planet is considered as the Dwarf planet?
The method of soil conservation in which different crops are grown in alternate rows and are sown at different times to protect the soil from rain wash is called?
Why does ice covered in sawdust not melt quickly?