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