Carbon dioxide is produced by all of the following except
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Chernobyl disaster is the result of pollution by_____________
Marble is a metamorphic rock of _______.
The source of energy in an ecosystem is
Which acid is released when an Ant bites?
What was the shape of the galaxy named A1689 B11 that existed 11 billion years ago?
The longest day of the year in the Northern Hemisphere occur on _____.
Charcoal can be made at home by burning