sales tax: a tax based on the cost of the item purchased and collected directly from the buyer
excise: a tax that is measured by the amount of business done (not on property or income from real estate)
eutrophication: excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of plant life; the decomposition of the plants depletes the supply of oxygen, leading to the death of animal life