Word: ecosystems
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...threats. According to Nilson de Barros, president of the Society for the Defense of the Pantanal, the rivers that feed into its marshes are being polluted by gold mining, deforestation and agriculture. To feed cattle herds, some ranchers are planting exotic grasses that threaten the delicate balance of the ecosystem. Wild-animal dealers are going after such items as rare birds and capybara skins. But De Barros believes the problems will be kept under control. He stresses that the Pantaneiros have traditionally respected the area's riches, and they are beginning to realize that their home has great potential...
...population explosion is a major factor inthe Earth's crisis, according to Gore. He saidother factors include the scientific andtechnological revolution and "our way ofthinking...the assumption that we are separatefrom the Earth and its ecosystem...
Although scientists still disagree over whether the threat of global warming is an imminent problem, new findings by a team of Harvard researchers strongly suggest that current high levels of carbon dioxide in the atmosphere will profoundly alter the ecosystem...
...attempt to determine the effects of atmospheric carbon dioxide levels on the ecosystem, Bazzaz and Fajer also examined the reactions of various insect populations to such nutrient deficient plants...
Panelists charged that the Hydro-Quebec project, which is currently being built in James Bay, Quebec, is damaging the area's ecosystem and destroying traditional native culture...