It's extremely frustrating to me to communicate over and over again, as clearly as I can. 军训心得800字And we are still, by far, the worst contributor to the problem. And I look around and look for really meaningful signs 烁的组词是什么that we're about to really change. I don't e it right now.
A number of very reputable scientists have said that one factor of air pollution is oxides of nitrogen from decaying vegetation. This is what caus the haze that gave the big Smoky Mountains their name.Thank you very much, okay.
This guy is so far off in the environmental extreme, we'll be up to our neck in owls and out of work for every American.This guy is crazy.
Even if humans were causing global warming, and we are not, this could be maybe the greatest hoax ever perpetrated on the American people. We're dealing with something that's highly emotional.qq同步 If an issue is not on the tips of their constituents' tongues,it's easy for them to ignore it.仓库管理制度
To say, "Well, we'll deal with that tomorrow."
英雄作文素材
So the same phenomena of changing all the patterns
过期的酸奶有什么用途is also affecting the asons. Here is a study from the Netherlands. The peak arrival date for migratory birds 25 years ago was April 25th, and their chicks hatched on June the 3rd. Just at the time when the caterpillars were coming out.Nature's plan.But 20 years of warming later,the caterpillars peaked two weeks earlier,and the chicks tried to catch up with it, but they couldn't.And so, they're in trouble.And there are millions of ecological niches that are affected by global warming in just this way. This is the number of days with frost in Southern Switzerland over the last 100 years. It has gone down rapidly. But now watch this.
This is the number of invasive exotic species that have rushed in to fill the new ecological niches that are opening up. That's happening here in the United States, too. You've heard of the pine beetle problem? Tho pine beetles ud to be killed by the cold winters, but there are fewer days of frost, and so the pine trees are being devastated. 茧蛹的做法This is part of 14 million acres of spruce trees in Alaska that have been killed by bark beetles. The exact
same phenomenon. There are cities that were founded becau they were just above the mosquito line.Nairobi is one, Harare is another. There are plenty of others.Now the mosquitoes, with warming, are climbing to higher altitudes.There are a lot of vectors for infectious dias that are worrisome to usthat are also expanding their range.Not only mosquitoes, but all of the others as well.And we've had 30 so-called new diasthat have emerged just in the last quarter century.And a lot of them, like SARS, have caud tremendous problems.The resistant forms of tuberculosis. There are others.And there's been a re-emergence of some diasthat were once under control.The avian flu, of cour, quite a rious matter, as you know.West Nile Virus.It came to the eastern shore of Maryland in 1999.Two years later, it was across the Mississippi.And two years after that, it had spread across the continent.But the are very troubling signs.Coral reefs all over the world,becau of global warming and other factors,are bleaching and they end up like this.And all the fish species that depend on the coral reefsare also in jeopardy as a result.Overall, species loss is now occurringat a rate 1,000 times greater than the natural background rate.This brings me to the cond canary in the coal mine.Antarctica.
The largest mass of ice on the planet by far.A friend of mine said in 1978,"If you e the breakup of ice shelves along the Antarctic peninsula,"watch out"becau that should be en as an alarm bell for global warming."And actually, if you look at the peninsula up clo,every place where you e one of the green blotches here is an ice shelf larger than the state of Rhode Island that has broken up just in the last 15 to 20 years.I want to focus on just one of them.It's called Larn B.I want you to look at the black pools here.It makes it em almost as if we're looking through the iceto the ocean beneath. But that's an illusion.This is melting water that forms in pools,and if you were flying over it in a helicopter,you'd e it's 700 feet tall.They are so majestic, so massive.In the distance are the mountains and just before the mountainsis the shelf of the continent, there.This is floating ice,and there's land-bad ice on the down slope of tho mountains.From here to the mountains is about 20 to 25 miles.Now they thought this would be stable for at least 100 years,even with global warming.The scientists who study the ice shelves were absolutely astonished when they were looking at the images.Starting on January 31, 2002
in a period of 35 daysthis ice shelf completely disappeared.They could not figure out how in the world this happened so rapidly.And they went back to try to figure out where they'd gone wrong.And that's when they focud on tho pools of melting water.But even before they could figure out what had happened there,something el started going wrong.When the floating a-bad ice cracked up,it no longer held back the ice on the land,and the land-bad ice then started falling into the ocean.It was like letting the cork out of a bottle.And there's a difference between floating ice and land-bad ice. That's like the difference between an ice cube floating in a glass of water, which when it melts doesn't rai the level of water in the glass, and a cube that's sitting atop a stack of ice cubes which melts and flows over the edge. That's why the citizens of the Pacific nations have all had to evacuate to New Zealand.But I want to focus on West Antarctica
becau it illustrates two factors about land-bad ice and a-bad ice.It's a little of both. It's propped up on tops of islands,but the ocean comes up underneath it.
So as the ocean gets warmer, it has an impact on it.
If this were to go,a level worldwide would go up 20 feet.They've measured disturbing changes on the underside of this ice sheet.It's considered relatively more stable, however,than another big body of ice that's roughly the same size.Greenland would also rai a level almost 20 feet if it went.A friend of mine just brought back some picturesof what's going on on Greenland right now.
Dramatic changes. The are the same kinds of pools
that formed here, on this ice shelf in Antarctica.And the scientists thought that when that water eped back into the ice, it would just refreeze.But they found out that actually what happens is that it just keeps on going. It tunnels to the bottom and makes the ice like Swiss chee,sort of like termites. This shows what happens to the crevass,and when lakes form, they create what are called moulins. The water goes down to the bottomand it lubricates where the ice meets the bedrock.
See the people here for scale.This is not on the edge of Greenland, this is in the middle of the ice mass.This is a massive rushing torrent of fresh melt water tunneling stra
铁英语ight down through the Greenland ice to the bedrock below. Now, to some extent, there has always been asonal melting and moulins have formed in the past, but not like now.
In 1992, they measured this amount of melting in Greenland. Ten years later, this is what happened. And here is the melting from 2005. Tony Blair's scientific advisor has said that becau of what's happening in Greenland right now, the maps of the world will have to be redrawn. If Greenland broke up and melted,
or if half of Greenland and half of West Antarctica
broke up and melted, this is what would happen to the a level in Florida. This is what would happen to San Francisco Bay. A lot of people live in the areas. The Netherlands, one of the low countries. Absolutely devastating. The area around Beijing that's home to tens of millions of people. Even wor, in the area around Shanghai, there are 40 million people. Wor still, Calcutta, and to the east, Bangladesh,
