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Fossil fuels like methane and carbon dioxide trap heat near the surface, a process known as the greenhouse effect. The greenhouse effect is a natural phenomenon, but human activities, like the burning of fossil fuels, can pour enormous volumes of these gases into the atmosphere, raising the planet's temperature and destabilizing the climate. (Watch what happens to our planet when manmade emissions get trapped in the atmosphere )

ome contaminants are carcinogens. DDT is toxic to humans and can alter chromosomes. PCBs cause liver and nerve damage, skin eruptions, vomiting, fever, diarrhea, and fetal abnormalities. Along many shores, shellfish can no longer be taken because of contamination by DDT, sewage, or industrial wastes.

Dysentery, salmonellosis, cryptosporidium, and hepatitis are among the maladies transmitted by sewage in drinking and bathing water.

water pollutants are hazardous to humans as well as lesser species; sodium is implicated in cardiovascular disease, nitrates in blood disorders. Mercury and lead can

Why We Celebrate the New Year A legend of China recounts how people along the Yellow River Basin lived a simple, nomadic life, very content and happy. On a cold winter evening a mysterious being attacked the village and destroyed the villager's property. A village meeting was held and precautions taken to protect them from the intruder. Noting happened and people went about their daily routines. Then the mysterious being struck again, causing even greater damage to lives and property. Again, the villagers gathered and prepared for their safety. And again, nothing happened and people went about their normal activity, feeling secure and safe. But the mysterious force struck a third time, causing much loss and great fear among the villagers. An elderly scholar had studied the intrusions, watching the stars and heavenly bodies and recording their movements. He explained that the intruder came when the heavenly bodies were in a particular order and after the sun had appeared 365 times. The villagers studied this theory closely and learned that the intruder feared three things: the color red, illumination and noise. They called the intruder Nien or year. On the following 365th day, preparations were made for the return of Nien. Houses were lit with lanterns, objects were painted bright red and loud noises were made until dawn of the next day. The villagers' plan worked and the mysterious intruder did not appear. It was decided that from then on, a thanksgiving ceremony would be held every 366th evening to thank all the god for their blessings. And that the same preparations would be made for the return of Nien, scaring away the evil deeds of the spirits. Thus we celebrate the new year, chasing away evil with fireworks and celebrating with festivity and food.

The Wrong Way to Win › Introduction to The Wrong Way to Win › Why Do Athletes Use Performance-enhancing Drugs? › Masking Pain and Managing Weight and Stress › Detecting Drugs Why Do Athletes Use Performance-enhancing Drugs?

An athlete may want to: Build mass and strength of muscles and/or bones Increase delivery of oxygen to exercising tissues Mask pain Stimulate the body Hide use of other drugs

Many drugs are banned outright in Olympic competitions. However, some drugs, such as cortisone and local anesthetics, are merely restricted because they have legitimate clinical uses. Athletes may also misuse drugs to reduce weight, relax, cope with stress or boost their own confidence. Whatever the reason, doping has many unsafe if not deadly side effects.

Some athletes choose to use "anabolic" (or growth-promoting) steroids in the hopes of improving athletic performance

Steroids are substances that your body makes naturally in the form of hormones.

These are examples of steroids requiring physician prescription which are banned in sport competition:

Green house gases stay can stay in the atmosphere for an amount of years ranging from decades to hundreds and thousands of years. No matter what we do, global warming is going to have some effect on Earth. Here are the 5 deadliest effects of global warming.

As the temperature of oceans rises, so will the probability of more frequent and stronger hurricanes

global warming will exacerbate the conditions and could lead to conflicts and war.

The Ryukyu chain to the southwest was U.S.-occupied from 1945 to 1972, when it reverted to Japanese control, and the Kurils to the northeast are Russian-occupied.

Constitutional monarchy with a parliamentary government.

Through the 700s Japan was much influenced by China, and the Yamato clan set up an imperial court similar to that of China.

Many scientists have specified various reasons for global warming effects on the environment and for human life. It is not easy to point one reason for global warming effects, but recently you might have saw many change in global climate. Global warming effects have various consequences such as glacier volume decreasing, rise in sea levels, shrinkage of Arctic and altered fashion of doing agriculture have been named as direct effects on global warming. Secondary global warming effects are extreme weather events, increase in tropical diseases, changes in the timing of seasonal patterns in ecosystems, and drastic economic impact.

Before many times back, many scientist and researchers were hopping that a positive effect of global warming would be increased agricultural yields(outputs), because of the role of carbon dioxide in photosynthesis which might behave in positive manner, but now it resulting in destructions of several crops. In the area of Iceland, due the rising temperatures which have made possible the widespread sowing of barley easily in an effective manner, which was not possible twenty years from now. The net result is expected to be that 33% less maize—the country's staple crop—will be grown. The reduction in rainfall has turned millions of land into deserts.

Insurance industry has been affected very badly with the risk of insurance; the number of major natural disasters has been increased to 300% since 1960s, and insured losses increased fifteenfold in real terms. According to Choi and Fisher (2003) each 1% increase in annual precipitation could enlarge catastrophe loss by as much as 2.8%.

In 2002 about 40% of U.S. carbon dioxide emissions stem from the burning of fossil fuels for the purpose of electricity generation. Coal accounts for 93 percent of the emissions from the electric utility industry. US Emissions Inventory 2004 Executive Summary p. 10 Coal emits around 1.7 times as much carbon per unit of energy when burned as does natural gas and 1.25 times as much as oil. Natural gas gives off 50% of the carbon dioxide, the principal greenhouse gas, released by coal and 25% less carbon dioxide than oil, for the same amount of energy produced. Coal contains about 80 percent more carbon per unit of energy than gas does, and oil contains about 40 percent more. For the typical U.S. household, a metric ton of carbon equals about 10,000 miles of driving at 25 miles per gallon of gasoline or about one year of home heating using a natural gas-fired furnace or about four months of electricity from coal-fired generation.

Here is a part of his original [most recent] statement:"Hello everyone. My name is Guillermo Habacuc Vargas. I am 50 years old and an artist. Recently, I have been critisized for my work titled "Eres lo que lees", which features a dog named Nativity. The purpose of the work was not to cause any type of infliction on the poor, innocent creature, but rather to illustrate a point. In my home city of San Jose, Costa Rica, tens of thousands of stray dogs starve and die of illness each year in the streets and no one pays them a second thought. Now, if you publicly display one of these starving creatures, such as the case with Nativity, it creates a backlash that brings out a big of hypocrisy in all of us. Nativity was a very sick creature and would have died in the streets anyway. "So there is just this to say: We see, that not only the gallery was lying from the beginning, but also, what we have to think about all statements of this "artist".

Bats are often thought of as flying mice,but they are more closely related to primates, including humans, than they are to mice.

the bat's body is covered by hair, with the exception of its wings.

Vampire bats don't suck blood. They make a small incision and lap up the blood of their hosts.

Officials have said the algae is the result of a hot spell after heavy rain, but environmentalists said such blooms are largely due to sewage and agricultural pollutant run-off.

"It's not clean, but two years ago it was much worse, you would see bags and things floating in. Now you're not seeing bags," she said.

Canadian coach Dave Hughes said the water quality has improved a lot, but there are still spots where sailors track through what smell like sewage.