Environment

Arctic polar bears imperilled by man-made pollution

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The long term survival of polar bears is being threatened by man-made pollution that is reaching the Arctic.

This conclusion comes from a major review of research into how industrial chemicals such as mercury and organochlorines affect the bears.

The review suggests that such chemicals have a range of subclinical effects.

Iceland's volcanic ash halts flights across Europe

LONDON – British airport operator BAA Ltd. says all flights at London's Heathrow Airport have been suspended for the rest of the day, causing travel chaos as ash clouds from Iceland's spewing volcano halted air traffic across Europe.

A BAA spokesman said Thursday that no further flights are expected to arrive or land at the airport, which is Europe's busiest.

Heathrow handles over 1,200 flights and 180,000 passengers per day.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

LONDON (AP) — Ash clouds from Iceland's spewing volcano halted air traffic across a wide swathe of Europe on Thursday, grounding planes on a scale unseen in years, as authorities stopped all flights over Britain, Ireland and the Nordic countries.

BP encouraged that capped-off oil well still holds

{jcomments off}NEW ORLEANS – BP said its capped-off well appeared to be holding steady Friday morning, almost midway into a white-knuckle waiting period in which engineers watched the pressure gauges for signs of a leak.

Results monitored from control rooms on ships at sea and hundreds of miles away at the company's U.S. headquarters in Houston showed the oil staying inside the cap, rather than escaping through any undiscovered breaches, BP PLC vice president Kent Wells said on a conference call.

Gulf of Mexico oil leak 'worst US environment disaster'

The Gulf of Mexico oil spill is the worst environmental disaster the US has faced, a senior official has said.

White House energy adviser Carol Browner also said the US was "prepared for the worst scenario" that the leak might not be stopped before August.

BP is to try a new tactic after its latest failure to halt the leak, but says there is no guarantee of success.

BP chief operating officer Doug Suttles said even if it worked it would only halt a majority of the spill.

Storm could take away sights and sounds of BP well

{jcomments off}ON THE GULF OF MEXICO – Ships relaying the sights and sounds from BP's broken oil well stood fast Friday as the leftovers of Tropical Storm Bonnie blew straight for the spill site, threatening to force a full evacuation that would leave engineers clueless about whether a makeshift cap on the gusher was holding.

Vessels connected to deep-sea robots equipped with cameras and seismic devices would be among the last to flee and would ride out the rough weather if possible, retired Coast Guard Adm. Thad Allen said.