I do not think the industrial and agricultural revolutions could have occurred without the environmental costs. The industrial revolution in the 18th century occurred at a time in history when people where not aware of the consequences of their actions or the consequences of the widespread use of fossil fuels. Even if they were aware the technology would not have been present to harness power from natural renewable sources of energy.
The more light absorbed, the quicker the photosynthesis rate.
The answer is primary producers
The answer is a mutation. Its a mutation because a mutation can cause an organism to be deformed an in some cases due to the deformation it will not be able to feed or defend for it self. For example, if a Giraffe were to be born with a short neck it would not be able to feed because trees are tall. The answer is mutilation.