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Transcript of Global Warming.
Carbon Dioxide, and other Greenhouse Gases trap sunlight that comes to earth, and never lets heat escape. Imagine this. You're lying in bed,
with lots of blankets covering you.
Suddenly, you wake up, sweaty.
Then you kick off your blankets and
cool air hits your body. MUCH better.
But the problem is that we've put
so much greenhouse gases into the
atmosphere that the earth JUST CAN'T
KICK OFF THAT BLANKET.
THIS is Global Warming. When this polar bear is stranded
from lack of ice. We are causing it. With the invention of the car and littering, we are polluting the earth and creating holes in the ozone layer. Also, we launch a huge amount of carbon dioxide into the atmosphere every day. A chart of how global temperatures are rising. Perhaps this video will
explain it better. Here's the bad news. The problem's getting worse. The good news:We still have a lot of time. We have many ways to save the earth. We've all heard about reducing waste and recycling. But we just WON'T MAKE A DIFFERENCE. It's generally believed that cars and trucks and airplanes contribute an ungodly share of greenhouse gases. This has led many people to buy a hybrid car. However, an owner might be cancelling out its benefit, at least if he/she shops in the meat section. WHY? Cows-as well as sheep and other ruminants are WICKED polluters. The farting and belching of these animals produce methane, a gas 25 TIMES more potent than carbon dioxide. The world's ruminants are responsible for about 50% more greenhouse gases than the ENTIRE TRANSPORTATION SECTOR. The buying of locally grown food doesn't help. In fact, buying locally produced food actually INCREASES gases. WHY?
More than 80% of the emisions associated with food are in the production phase and big farms are far more efficient than small farms. Transpotation represents only 11% of emissions. The best way to help is to subtly change your diet. You could also change from eating beef to kangaroo, because kangaroo have the special bacteria in their stomachs to break down methane. I don't think you'd want to do that, though. How to solve this problem. Believe it or not, there is actually a way to solve this problem.
Let me explain.
Back in 1991, Mount Pinatubo erupted in the Phillipines. Pinatubo made Mount St. Helens look like a hiccup. It put more sulphur dioxide into the atmosphere than any volcano except for Krakatoa.
The atmospheric effects were undeniable: an increase in ozone, more diffuse sunlight, and a sustained drop in global temperature.
So the whole earth could be saved by sulphur dioxide!
There's only one problem with this solution: Dumping chemicals in the atmosphere to reverse the damage caused by......dumping chemicals in the atmosphere? We can STILL save the earth. But there
are 3 problems. Too little Too late Too optimistic Too Little Our typical conservation efforts simply won't make much of a difference. Our solutions to global warming won't add up enough to solve it. Wind power, solar power, and alternative energy sources are ok, but they don't add up enough. Other hybrid cars and Priuses are great, but they don't make up that big of a sector. Also, coal, our main power source, is so cheap that if we tried to generate power without it, it would basically be economic suicide, especially for developing countries.
Also, it doesn't really make a difference on whether we reduce emissions, because it's already... Too late Atmospheric carbon dioxide has a half-life of 100 years, and some of it remains for thousands of years. So even if all mankind stopped using carbon dioxide, it would take at least 200 years for the carbon dioxide to disperse. So, let's play an imagining game. PRETEND that USA maybe Europe somehow miraculously converted overnight to zero-carbon societies. And somehow, they persuaded China and India to demolish every gas and coal mine and truck. It wouldn't matter much, because carbon dioxide lasts for 200 years.
By the way, that zero-carbon society you were dreamily thinking about is way.... The Pale Blue Dot, a Voyager 1 photo showing Earth (circled) as a single pixel from 4 billion miles (6.4 billion kilometres) away. All of human history has happened on that tiny pixel, which is our only home. Too optimistic A lot of the things that people say would be a good thing probably aren't.
E.g, Solar power. The problem with solar cells is that they're black, because they are designed to absorb light from the sun. But only about 12 percent gets turned into electricity, and the rest is reradiated as heat-which contributes to global warming.
Global warming is not going to be solved by just one solution. We need all the solutions that we can get. It's not just the potential of sulphur that is surprising. The QUANTITY is also surprising. Just 34 gallons a minute can do the job:not much more than a heavy duty garden hose. Just 100,000 tons of sulfur dioxide per year would effectively reverse global warming in the Arctic and reduce it largely in the Northern Hemisphere. 100,000 tons might sound like a lot, but it's a smidge. At least 200 million tons of sulfur dioxide already go in the atmosphere each year, about 25% from volcanoes, 25% from human sources, and the rest from natural sources. So all that'd be needed for a world-changing effect would be 1/20 of 1% of current sulfur emissions, just relocated to a higher point in the sky.
For all you math freaks, that's 0.05% of all sulfur emissions.
How do we do this? Leverage But now Earth is in danger.
We call this danger GLOBAL WARMING. A garden hose to the sky Q:So, how to get 34 gallons of sulphur dioxide into the stratosphere?
A:A very long hose.
How it works:
At a base station, sulfur would be burned into sulfur dioxide and then liquefied. The hose would be about 18 miles long but extremely light. It's an example of a specialized fire hose. High strength helium balloons would be attached to it at 100-300 yard intervals. The sulfur dioxide would be sent to the sky by small pumps affixed every 100 yards. These would be light too: about 45 pounds each. At the end of the hose, a cluster of nozzles would spray the atmosphere with fine, colourless mist. This project is appropriately named Budyko's blanket. The winds at the top, which are howling at about 100 miles per hour, circulate around the globe in approximately 10 days. and would make sure the sulphur reached all the way around the globe. Which one? CO2 Financial Costs In this case, money is not a problem. The garden hose to the sky could be up and running with a start up cost of 20 million and an annual operating cost of 10 million. Having more bases would only cost 250 million dollars. The project is basically free compared with other things. For example, it would cost 50 million dollars less to set up this project than what Al Gore's foundation is paying just to increase public awareness about global warming. Conclusion So, what did we learn about global warming? Global warming is a planetary problem. Nathan Myhrvold, an esteemed scientist, supports this project, and is optimistic that we can the problem of global warming. However, Al Gore counters with his own logic:"If we don't know enough to stop putting 70 million tons of global-warming pollution in the atmosphere every day," he says, "how in God's name can we know enough to precisely counteract that?"
There's a problem with the logic here.
It's not that we don't KNOW HOW to stop, it's that we don't WANT to stop. If we keep this up, winter sports are going to become a fictional sport. There's also some truth to the fact that we could save a lot of energy. Here's how to reduce the amount of energy we use every day.
1.Plant a tree.
Trees are your best friends. We need them to live. One tree could soak up enough carbon dioxide as a car driven 45 miles.
2. Put fluorescent lights whenever possible. If every home replaced an incandescent bulb with a fluorescent bulb, they could save at least 30 dollars on the life of the bulb and could save enough energy to light up a city the size of Suwon.
3. Gulp! That's Plug backwards. Even when you're not charging your cell phone, all those plugs plugged in produce phantom power, or wasted power. So UNPLUG those plugs. One Unfortunate side effect of Global Warming Who would want to live here? Clouds of sulfuric acid, temperatures of up to 878 degrees Fahrenheit(470 degrees Celsuis) The seas have dried up and the atmosphere is so thick, sunlight can't break through. This is Venus. But if we're not careful, this could be Earth. Would you want to live on a planet like this? Venus is the second planet from the Sun and the sixth largest in the Solar System. Venus is often called Earth's twin. It is about the same size, mass, and compostition as the Earth. Venus is thought to be the least likely place in the Solar System for life to exist. One year on Venus=224.7 Earth days One day on Venus=243 Earth days. Also, the temperature is so hot that solid lead would melt there. The atmosphere is 90 times greater than on Earth. So, if you stood on the surface of Venus, you would feel the same pressure as you would at the bottom of a very deep ocean on Earth. You would look like this. Global Warming is destroying our planet. And we are the only ones who can do something about it.
What part will YOU play????? THE END.... Bibliography Superfreakonomics, Levitt, Steven Dubner, Steven www.wikipedia.com www.google.com The Cosmic Treasure Hunt, Hawking, Steven Hawking, Lucy Now, SERIOUSLY,
THE END. Temperature and carbon dioxide
go hand in hand. Like cookies and
milk. Mac and cheese. You get the