| Global warming is expected to change | | | | global average temperature has increased |
| magnitude to the worse of the intensity of | | | | about 0.7 to 1.4 degrees F (0.4 to 0.8 |
| power of nature, such as storms, hurricanes, | | | | degrees C). Global warming is influenced not |
| tropical cyclones and tornadoes. It is | | | | by individual weather events, but by the |
| determined not by individual weather events, | | | | global average surface temperature. North |
| such as heat periods or cold snaps or | | | | America did go through a reasonably normal |
| hurricanes, but by the planetary average | | | | winter in 2006-2007, and some parts had |
| above ground temperature. It is already | | | | severely cold weather this year. |
| raising the intensity of hurricanes in the | | | | |
| North Atlantic, increasing the risk of | | | | Greenhouse gases are an air pollution |
| devastating impact when a storm strike. | | | | problem, and all air pollution problems of |
| | | | the past have required significantly less to |
| Global warming is also the cause of more | | | | fix than projected, while declining speedier |
| spectacular variations and changes in the | | | | than believed. This gives cause to wish that |
| weather in some areas. It is already | | | | artificial greenhouse gases can be contained |
| affecting the world we know, endangering | | | | reasonably inexpensively and without |
| polar bears, cutting down ski seasons and | | | | sacrifying the planetary economy. Greenhouse |
| creating more intense storms, hurricanes and | | | | gases are transmitted by activities such as |
| cyclones. Global warming is a big gamble for | | | | the burning of fossile fuels, land clearing, |
| an increase in the average temperature of the | | | | and agriculture. Other phenomena such as |
| world's surface. | | | | solar fluctations and volcanoes have had |
| | | | smaller and likely disadvantageous cause. |
| Global warming is dreadful news for human | | | | |
| life, including differences in agricultural | | | | Global warming is already under way. The |
| yields, liquifying of glaciers and the poles, | | | | evidence is strong and the importancy of |
| and the extinction of doomed species for | | | | taking action is getting more distinct with |
| ever. | | | | every new scientific study. We have ten years |
| | | | at most, to initiate doing distinct cuts to |
| Global warming is an increase of average | | | | our greenhouse gas pollutions, or we will |
| world temperatures as a result of what is | | | | face severe consequences. The great news is |
| known as the greenhouse effect. Different | | | | that there is much we can do, but only if the |
| gases in the atmosphere behave like glass in | | | | world's different governments acts now and |
| a greenhouse, allowing sunlight through to | | | | take a firm stand on their affect on the rest |
| heat the world's surface but holding back | | | | of the world, especial such progressing |
| heat as it emits back into the space, causing | | | | powers as India and China, to link up in an |
| an increase in the average temperature of the | | | | global effort to prevent the global warming. |
| world's surface. After the late 1800's, the | | | | |