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.
Every single year, The congress works on a federal budget for the next year. The congress is in charge of the budget, they are given the power to collect taxes borrow money from banks, and approve of someone's spending.
Hope this helps!