Carbon dioxide when the fossil fuels is burned
That is correct, a good description of the HYPODERMIS. Hence many syringes get the name "hypodermic" needles.
I think the right answer is d!
Environmental parameters indicate whether or not resource use is harming the environment and this way monitoring environmental parameters affect policies regarding resource use. The correct option among all the options that are given in the question is the last option or option "d". By watching these indicators, it is possible to preserve the natural balance.