Word: sediments
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...special problem. Houses that once perched storklike on stilts above the land now sit in the waters of the Gulf of Mexico; the earth beneath them has washed away. Ecologists blame the erosion on dikes built along the Mississippi River which have diverted the flow of sediment that used to replenish beaches eaten away by the Gulf. If the erosion is not stopped, water from the Gulf may soon slice through State Highway 1, leaving 2,500 Grand Isle residents stranded...
...site themselves, Tidwell and his colleagues found two more fossilized palm logs. Near by, in the same geological formation, an oil company discovered ancient palm pollen. Other scientists, highly skeptical of the purported age of these finds, contended that they could easily have been washed down into the older sediment from higher and younger geological formations...
...Social Sediment. The Untouchables are castoffs from one of the world's most rigid social orders. Around 1500 B.C., according to many scholars, fair-haired Aryan invaders formalized the four-tier Hindu caste system and introduced a color factor.*The tiers soon evolved into economic strata, and by 500 B.C. a fifth level had been established for Atisudras, or Untouchables. The fifth stratum, peopled by the hated and despised children of intercaste marriages and the lowest laborers, became...
India's social and economic sediment...
...small cost. A surprisingly low $3 billion is all it would take if plants and factories were required to install waste-treatment facilities sufficient to meet existing water standards. A total of only $2 billion would pay for cooling towers to prevent thermal pollution, and $6 billion would bring sediment and acid mine drainage under control. The price of eliminating industrially caused air pollution is somewhat higher because the job must be done on a regular basis. Estimates are that it would cost $600 million a year to curb the sulfur dioxide emitted from power plants and another $100 million...