Natural environment has the ability to gather some pollutants yet if too much then the environment could no longer handle it. A leaky sewage can pollute an aquifer with I. arsenic as the contaminant. Arsenic is a metalloid existing in the Earth's crush. Exposure is natural yet can be aggravated by the human activities.
Good wolf because usually people with a good heart has strong faith or something<span />
I think it is a Carpenter absolutely
Math English and maybe science
A redshift can be described as a galaxy that is moving away form us. So the correct one is D.
