Panthera Tigris is the scientific name of
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Which of the following is the most abundant metal on Earth's crust?
The Great Smog of 1952 was a severe air-pollution event which affected _______.
Malachite is an ore/mineral of
Which is the highest quality of hard coal?
One of the best solutions to get rid of nonbiodegradable waste is
In 2004, NASA launched the Messenger Spacecraft to study ___.
Which of the following fuels causes minimum environmental pollution?
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