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The Earth is getting hotter!!!
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Over the past 150 years, the majority of mountain glaciers monitored have been shrinking. Many glaciers at lower latitudes are now disappearing, and scientists predict that, under some plausible warming scenarios, the majority of glaciers will be gone by the year 2100. As glaciers continue to shrink, summer water flows will drop sharply, disrupting an important source of water for irrigation and power in many areas that rely on mountain watersheds.

Warmer temperatures increase melting of mountain glaciers, increase ocean heat content, and cause ocean water to expand. Largely as a result of these effects, global sea level has risen 4 to 10 inches (10-25 cm) over the past 100 years. With additional warming, sea level is projected to rise from half a foot to 3 feet (15-92 cm) more during the next 100 years. On average, 50 to 100 feet (15-30 meters) of beach are lost for every foot (0.3 meters) of sea-level rise. Local land subsidence (sinking) and/or uplift due to geologic forces and coastal development will also affect the rate of coastal land loss.

Human activity has been increasing the concentration of greenhouse gases in the atmosphere (mostly carbon dioxide from combustion of coal, oil, and gas; plus a few other trace gases). There is no scientific debate on this point. Pre-industrial levels of carbon dioxide (prior to the start of the Industrial Revolution) were about 280 parts per million by volume (ppmv), and current levels are greater than 380 ppmv and increasing at a rate of 1.9 ppm yr-1 since 2000. The global concentration of CO2 in our atmosphere today far exceeds the natural range over the last 650,000 years of 180 to 300 ppmv.

One of the most vigorously debated topics on Earth is the issue of climate change. Global changes in temperature extremes include decreases in the number of unusually cold days and nights and increases in the number of unusually warm days and nights. Other observed changes include lengthening of the growing season, and decreases in the number of frost days.

Global temperature extremes have been found to exhibit no significant trend in interannual variability, but several studies suggest a significant decrease in intra-annual variability. There has been a clear trend to fewer extremely low minimum temperatures in several widely-separated areas in recent decades. There is some indication of a decrease in day-to-day temperature variability in recent decades.

Though Americans make up just 4 percent of the world's population, they produce 25 percent of the carbon dioxide pollution from fossil-fuel burning -- by far the largest share of any country. In fact, the United States emits more carbon dioxide than China, India and Japan, combined. Though, people living in this earth are seperated by boundries and borders, we can not divide the atmosphere among us. We share the same atmosphere and breathe the same air. So its not fair; developing countries suffering from the mistakes of the developed ones. Clearly America ought to take a leadership role in solving the problem.

Nepal's share in the global emission of greenhouse gases is almost nil. Nevertheless the consequences of global warming and climate change - receding snowlines, lake bursts and flash floods - threaten to wash away vast areas of the country, including the region that's home to Mount Everest. The meltdown has sent a chill across the Himalayan nation. Over the last couple of years, it has recorded a hazy winter, hotter summer months and frequent landslides, which experts attribute to climatic change. Weathermen believe this could be the harbinger of even more miserable weather to come. "The average temperature in Nepal is rising by 0.5 degrees Celsius per decade.

Global warming is happening and man is contributing to it. Now, it is our responsibility to work to mitigate the impacts of potentially catastrophic climate change. We simply will not have a world to live in if we continue our neglectful ways. By making simple changes, we can reduce the amount of carbon dioxide released into the atmosphere and help stop global warming.

There are many simple steps we can take right now to cut global warming pollution. Lets make energy conservation a part of our daily routine. Each time we choose a compact fluorescent light bulb over an incandescent bulb, we'll lower our energy bill and keep nearly 700 pounds of carbon dioxide out of the air over the bulb's lifetime.

July 12, 2008 | 8:15 AM Comments  0 comments

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