Because they burn fossil fuels, and in this process large amounts of polluting gases (such as carbon dioxide, sulphure dioxides, nitrogen oxides) are released into the atmosphere. Carbon dioxide is especially problematic, because it is a greenhous gas: most of it cannot be re-absorbed by natural processes therefore increasing the global warming effect.
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Answer:
Explanation:
Hello,
In this case, since the speed is defined in terms of the distance over time:
We can easily solve for the time with the given speed and distance:
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