According to the text, what four human activities have the greatest harmful impacts on the environment?
What will be an ideal response?
The human activities that have the greatest harmful impacts on the environment are:food productiontransportationenergy use
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Why will we never be able to replace the gasoline we currently use to power our vehicles in the U.S. by either ethanol made from corn or cellulosic ethanol?
What will be an ideal response?
When do strong chinook winds develop in the Lethbridge area?
A. During the summer when a low-pressure centre forms B. During the winter when a high-pressure centre forms C. During the winter when a low-pressure centre forms D. During the summer when a high-pressure centre forms
Wind blowing from the south along a Northern Hemisphere west coast for a prolonged period can result in
____________, producing areas that are often low in nutrients and have low biological productivity. Fill in the blank(s) with the appropriate word(s).
At the current rates of use, the United States has enough coal to last the next
A) 20 years. B) 40 years. C) 100 years. D) several centuries.