For humans, the Arctic is a harshly inhospitable place, but the conditions there are precisely what polar bears require to survive – and thrive. ‘Harsh’ to us is ‘home’ for them.
Forty percent of the United States drains into the Mississippi. It’s agriculture. It’s golf courses. It’s domestic runoff from our lawns and roads. Ultimately, where does it go? Downstream into the gulf.
Green’ issues at last are attracting serious attention, owing to critically important links between the environment and the economy, health, and our security.
That, in turn, influences the temperature of the planet. The Arctic is now vulnerable because of the excess carbon dioxide in the atmosphere, with a rate of melting that is stunning.
Since the middle of the 20th century, more has been learnt about the ocean than during all preceding human history; at the same time, more has been lost.
Photosynthetic organisms in the sea yield most of the oxygen in the atmosphere, take up and store vast amounts of carbon dioxide, shape planetary chemistry, and hold the planet steady.
The Exxon Valdez spill triggered a swift and strong response that changed policies about shipping, about double-hulled construction. A number of laws came into place.
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