Fifty more timely problems of the environment.

The article includes very brief reports on various environmental topics. Some of the topics include: Earthquake-resistant building construction. Noise pollution: Ecological changes caused by the Aswan Dam; Monitoring startup of new mines and shutdown of old furnaces; Arsenic in detergents and in run-off waters; Damaged food value of vegetable crops; Enzymes in detergents; Environmental safety in Houston Ship Channel; Limits of human tolerance for mercury content of foods; Scaled costing of water as incentive for industrial reuse; Thermal pollution of lakes and rivers; Survey of pollution control by industry; Oil discoveries in the Arctic ownership; New City on Staten Island; Pneumatic collection of trash citywide; Deep well waste disposal for water; STOL Airports for large cities; Sinking land combatted by solid waste disposal; Water pollution by feed lots; Radiation treatment for sewage; Tax incentives for coal burners.