Nuclear power plants, which produce electrical energy, use large quantities of water for cooling. Often, small fish, larvae, and fi sh eggs are sucked in along with the cooling water and destroyed. This example illustrates how

Acid rain is a major problem in the Adirondack Mountains. Evidence that acid rain negatively affected the Adirondack ecosystem is that

An invasive species, the spiny water flea, was recently found in a New York lake. These water fleas eat zooplankton, a food also consumed by native fishes. The fleas spread from lake to lake by attaching to fishing lines, anchor ropes, and boats. Which statement best describes the effect of the water flea on the lake?

When deciding on new environmental policies and laws, which term is used to describe the comparison between benefi ts and costs of human activities?

When humans place grass clippings and other yard waste in landfills, they are most directly interfering with the natural process of

Two new wind turbines have recently been built within the Eiffel Tower in Paris. The power that these turbines generate will be enough to power the entire fi rst floor of the tower, including the restaurants, shops, and exhibits. A benefit of using wind power as an alternative source of energy is that it

The fast food industry in the United States buys many russet potatoes from farmers. Therefore, most potato farmers grow russet potatoes. If farmers continue to plant the same crop in the same fi elds year after year without putting additives into the soil, the end result could be

More than 100 years ago, Earth's atmosphere contained about 280 parts per million (ppm) of carbon dioxide. It is predicted that by the year 2050, the level of carbon dioxide in the atmosphere could reach 700 ppm, greatly increasing Earth's temperature. It has been suggested that growing more green plants would help to slow this increase. The best explanation for why increased numbers of plants would help is that plants