Word: riversing
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But Rio's selection as the host city will redound to its benefit. Government officials, eager to put the best face on the city for the 30,000 expected visitors, have repaved the roads, expanded the airport, built a new downtown expressway and preened the beachfront parks and promenades. Street...
The region does face 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...
Britain's National Rivers Authority has been especially active. Its interest persuaded the electronics industry to come up with a briefcase-size monitor that can be used on a riverbank to measure the amount of dissolved oxygen and ammonia in the water, along with its acidity and turbidity. The authority...
The world has already overshot the saturation point in its ability to process many wastes. For instance, a doubling of human population would be likely to boost the concentrations of nitrates in rivers 55%. Nitrates, which get into the water from air pollution and fertilizer runoff, are among the most...
While there has been some environmental progress in individual countries, the state of the world has mostly gone downhill. Air pollution, a major issue in Stockholm, has grown significantly worse in most cities. Even more alarming, it is now overshadowed by broad atmospheric changes, such as ozone depletion and the...