Question

$\huge \colorbox{plum}{answer \: it}$
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Answer 1

a)the energy contained in a fuel or food, determined by measuring the heat produced by the complete combustion of a specified quantity of it. This is now usually expressed in joules per kilogram.

b)The Red Data Book is the state document established for documenting rare and endangered species of animals, plants and fungi as well as some local sub-species that exist within the territory of the state or country.

c)Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities.