(Encyclopedia) permafrost, permanently frozen soil, subsoil, or other deposit, characteristic of arctic and some subarctic regions; similar conditions are also found at very high altitudes in…
COASTAL EROSIONSEA-LEVEL CHANGEFIND OUT MORECoasts, which form the boundary between land and ocean, receive a constant battering from the wind and waves. In calm weather, the water merely…
(Encyclopedia) Ban Ki-MoonBan Ki-Moonbän gē-m&oomacr;n [key], 1944–, South Korean diplomat, secretary-general of the United Nations (2007–16), b. Chungju, grad. Seoul National Univ. (B.S., 1970…
Energy is the power we use for transportation, for heat and light in our homes and for the manufacture of all kinds of products. There are two sources of energy: renewable and nonrenewable energy.…
Sure, cars and trucks are convenient, and most of us couldn't live without them, but they have become very expensive to run and harmful to the environment. Gas prices…
Each year the organization American Rivers analyzes the condition of the nation's rivers to determine which are the most “endangered.” Threats to these rivers include dams and channelizations that…
Each year the organization American Rivers analyzes the condition of the nation's rivers to determine which are the most “endangered.” Threats to these rivers include dams and channelizations that…
(Encyclopedia) Lawrence Berkeley National Laboratory and Lawrence Livermore National Laboratory, scientific research centers run by the Univ. of California, located in Berkeley, Calif., and Livermore…
