The longest river in Canada is the Mackenzie River (Northwest Territories, British Columbia, Alberta), which is 4,241 kilometres long. The largest lake entirely in Canada is Great Bear Lake (Northwest ... in Canada is Great Slave Lake (Northwest Territories), which has a depth of 614 metres.
The United States loses more than 1,821 square kilometres of wetlands each year.
Acid rain has a pH of 3.6, which is 100 times more acidic than normal rainwater, which has a pH of 5.6.
Male moths have larger antennae than females. Beneficial for detecting the pheromones released by females.
About 70 percent of the earth is water, but only 2.5 percent of that is freshwater. Of the freshwater, 68.9 percent is in the form of glaciers and snow cover, 30.8 percent is groundwater, and about 0.3 percent is in lakes and rivers.
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