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The ploughshare (plow -share) tortoise is one of the world's most endangered animals. Experts estimate that there are fewer than 300 adults in the wild. A small piece of land in northwest Madagascar is the species' only natural habitat. Because…
The first Earth Day was celebrated on April 22, 1970. Energy & Waste The average American produces more than four pounds of garbage per day. Over the course of a year, that is more than 1,600 pounds of garbage per…
California has survived many droughts. But the current dry spell, now in its fourth year, is one of the most severe the state has ever experienced. A shortage of precipitation has left lakes, reservoirs, and other sources of water at…
