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...earn their breakfast, the 15,000 G.l.s of the U.S. 2nd Infantry Division collectively run some 60,000 miles every morning-4 miles per man (including officers) in at least 32 minutes. The division has good reason for keeping its men in top shape: it defends a 500-sq.-mi. area bestriding the Uijongbu Corridor, traditional invasion route to Seoul and a mere 15 miles from...
...Rwanda, a nation in east central Africa, has an area of only 10,000 sq. mi.-and seems to be too small for both elephants and men. Its population, now 4 million, has been increasing rapidly, creating a desperate demand for farm land. As starving tribesmen cultivated new forest acreage, less and less land was left for the local herds of elephants. Result: hungry pachyderms have been raiding the peasants' shambas, often devastating the small subsistence plots in the process -and further reducing the food supply. Rwanda's President, General Juvénal Habyalimana, therefore ordered that...
...water table lowers, the clay covering over the caverns becomes more compact and weaker; sometimes it collapses completely, creating gaping craters known as sinkholes. In one Birmingham industrial park, more than 200 such collapses have occurred in recent years, turning a half-sq.-mi. area into a facsimile of the lunar landscape. No end to the problem appears to be at hand. As the New York Academy's journal, The Sciences, points out, "With man's seemingly unquenchable thirst for Earth's fluids, the land will continue to sink...
Near Los Angeles, a 20-sq.-mi. depression has formed around the Wilmington oilfield after 35 years of exploitation. At the center of the great bowl lies the Long Beach Naval Shipyard, where a 29-ft. decline in the land level has forced the Navy, oil companies and others to build flood-control dikes. Besides twisting railroad tracks, crushing oil-well casings and undermining buildings, the slumping of the ground has also triggered small earthquakes. To jack up the sunken terrain, the city of Long Beach has been forcing water back into the ground...
...expensive solar collectors. But solar energy, once explored only by smaller companies, now is attracting such big firms as PPG Industries, Lockheed, Westinghouse and Revere Copper & Brass. This week General Electric will show off its solar-heated Valley Forge, Pa., plant to the public; the system uses 5,000 sq. ft. of roof-borne solar collectors and is expected to save 12,000 gal. of fuel oil in an average heating season...