Global Warming PSA (Nhung, Anh & Dang)

This video is created by Nhung, Anh and Dang.

Three Facts (PSA)
By Anh, Nhung, Dang

1.             National Geographic:

( http://news.nationalgeographic.com/news/2004/12/1206_041206_global_warming.html )

Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880, much of this in recent decades, according to NASA's Goddard Institute for Space Studies.

The Arctic is feeling the effects the most. Average temperatures in Alaska, western Canada, and eastern Russia have risen at twice the global average, according to the multinational Arctic Climate Impact Assessment report compiled between 2000 and 2004.

Arctic ice is rapidly disappearing, and the region may have its first completely ice-free summer by 2040 or earlier. Polar bears and indigenous cultures are already suffering from the sea-ice loss.

2. Environment National Geographic:

( http://environment.nationalgeographic.com/environment/global-warming/gw-causes )

One of the first things scientists learned is that there are several greenhouse gases responsible for warming, and humans emit them in a variety of ways. Most come from the combustion of fossil fuels in cars, factories and electricity production. The gas responsible for the most warming is carbon dioxide, also called CO2. Other contributors include methane released from landfills and agriculture (especially from the digestive systems of grazing animals), nitrous oxide from fertilizers, gases used for refrigeration and industrial processes, and the loss of forests that would otherwise store CO2.

3. Environment About:

( http://environment.about.com/od/pollution/a/litter.htm )

Litter Prevention Around the World
A more grassroots-oriented litter prevention group is Auntie Litter, which started in 1990 in Alabama to help educate students there about the importance of a healthy and clean environment. Today the group works internationally to help students, teachers and parents eliminate litter in their communities.

Only You Can Prevent Litter
Doing your part to keep litter to a minimum is easy, but it takes vigilance. For starters, never let trash escape from your car, and make sure household garbage bins are sealed tightly so animals can’t get at the contents. Always remember to take your garbage with you upon leaving a park or other public space. And if you’re still smoking, isn’t saving the environment a compelling enough reason to finally quit? Also, if that stretch of roadway you drive everyday to work is a haven for litter, offer to clean it up and keep it clean. Many cities and towns welcome “Adopt-A-Mile” sponsors for particularly litter-prone streets and highways, and your employer might even want to get in on the act by paying you for your volunteer time.

* This website fains reputation for giving informations about many topics and it’s part of The New Yorks Time newspaper so is it credible sources.

4. Goverment Site:

( http://www.eia.gov/oiaf/1605/ggccebro/chapter1.html )

What Are Greenhouse Gases?
Many chemical compounds found in the Earth’s atmosphere act as “greenhouse gases.” These gases allow sunlight to enter the atmosphere freely. When sunlight strikes the Earth’s surface, some of it is reflected back towards space as infrared radiation (heat). Greenhouse gases absorb this infrared radiation and trap the heat in the atmosphere. Over time, the amount of energy sent from the sun to the Earth’s surface should be about the same as the amount of energy radiated back into space, leaving the temperature of the Earth’s surface roughly constant.

Many gases exhibit these “greenhouse” properties. Some of them occur in nature (water vapor, carbon dioxide, methane, and nitrous oxide), while others are exclusively human-made (like gases used for aerosols).