1. Global Warming

2. Brazil Plane Crash
Aviators call São Paolo's Congonhas Airport "the aircraft carrier," because landing on its notoriously short runway, surrounded by densely populated residential areas, is as touchy as trying to put down on the deck of a ship at sea. Though a Brazilian court had banned large jets from the airport in February, citing safety concerns, the ban was later overturned. On July 17, the pilot of TAM Airlines Flight JJ3054, tried to land at Congonhas, but realizing he wouldn't be able to stop in time on the rain-slicked tarmac, tried to take off again. He failed. The Airbus A320 skidded across a road, smashed into a gas station and then into a building owned by the airline. The ensuing fireball killed all 186 people on the plane and 13 more on the ground, making this the worst air disaster in Brazilian history.
3. Southern California Forest Fires
California has been ravaged by wildfires for thousands of years; they're an
essential part of the natural ecosystem. But the fires that burned hundreds of
square miles between Oct. 20 and Nov. 6 — at the disaster's peak, 18 separate
fires were burning, the worst of them in San Diego County — killing 10 people
and forcing at least half a million more from their homes, weren't entirely
natural. At least one, the Santiago Canyon blaze, was deliberately set, while
two others — the Witch and Rice Canyon fires — were caused by downed power
lines that ignited surrounding brush. Whether that brush should have been more
thoroughly cleared, and whether people should be permitted to build homes in
remote, fire-prone areas, are now matters of active debate, to say nothing of
lawsuits.
4. Yangtze River Dolphin Extinction
The Chinese called it baiji and "goddess of the Yangtze," and
it was the only surviving member of a family of species that split off from
saltwater whales and dolphins between 20 million and 40 million years ago. But
now, according to a survey released in August, this rare freshwater mammal is
almost certainly extinct — the first aquatic vertebrate species to disappear
from the Earth in 50 years, and the first large mammal to fall victim to human
impact. The multiple pressures: noisy boat collisions and dam construction that
may have imperiled the sonar-driven animals, and overfishing — not for the
dolphins themselves, but for river fish — with such indiscriminate techniques
as netting, dynamite and powerful electric shocks. The disappearance of a
top-level predator like the baiji — an indicator species that signals
the health of its ecosystem — portends trouble for the Yangtze River and for
the 400 hundred million people who depend on it
5. Minneapolis Bridge Collapse
Bridges failed this year in China and in Guinea, killing 64 and 70 people,
respectively. But the disaster that really grabbed U.S. headlines was the
collapse of the I-35 bridge in Minneapolis on Aug. 1, where the death toll
reached only 9. The attention wasn't due only to Americans' interest in news that's
closest to home. Rather, it was that the occurrence seemed so impossible: We
think of our highways and other infrastructure as being so well built and so
rigorously inspected and maintained as to be immune from such dramatic and
sudden disintegration. But this tragedy probably resulted from a design
imperfection when the bridge was built, followed by four decades of harsh
weather and road salt, proving that nothing is failsafe.
6. Utah Mine Collapse
For days afterward, mine owner Robert Murray insisted that it had been an
earthquake — and indeed, seismologists confirmed that the earth had moved near
Huntington, Utah, on Aug. 6. But the quake didn't cause the Crandall Canyon
coal mine to collapse, trapping six miners inside. The quake was the
collapse, as the mine, its walls weakened by decades of coal removal, gave way.
Ten days later, three rescuers were killed by a second collapse, and shortly
after that, attempts to reach the trapped men by drilling down from above were
called off. The mine was sealed in October.
7. North Korea Oil Pipe Explosion
The fanatically secretive North Korean government rarely reports internal problems,
so it fell to aid organizations to get the news out: On June 9, an aging oil
pipeline sprung a leak in North Pyongyang province. Local residents in the
fuel-starved country rushed in to scavenge what they could — and then the oil
caught on fire and exploded. At a minimum, 110 people died, but it's unlikely
that the government will ever acknowledge the incident at all.
8. Siberia Mine Explosion

9. Mozambique Munitions Explosion
A stockpile of old ammunition, stored at a Mozambican army facility in the
outskirts of the city of Maputo, blew up on Mar. 22, triggering fires and
killing 117 people. According to the Mozambique Red Cross, heavy traffic in the
area hampered the organizations attempts to rush volunteers to the site.
10. Congo Train Derailment

Source By : http://content.time.com/time/specials/2007/article/0,28804,1686204_1686252_1690600,00.html