Continued Warming Predicted

Entrepenas Reservoir

Because greenhouse gases already released into the atmosphere will linger for many years, and because the Earth is slow to adjust to these changes, the climate is expected to continue to warm A boat sits on the dry reservoir bed of the Entrepenas reservoir in Spain in 2006. The IPCC says future warming is expected to be greatest over land and in the high northern latitudes. A boat sits on the dry reservoir bed of the Entrepenas reservoir in Spain in 2006. The IPCC says future warming is...

The Role for Renewable Energy

The ideal solution to global warming would be a technological one that allows the world to switch quickly from fossil fuels to renewable energy sources such as solar, wind, biomass, and geo-thermal, which emit zero or low levels of carbon dioxide. Each of these sources, however, has its limitations. According to many experts, wind power is the most promising source of clean energy. Turbines capture the energy of the wind using propeller-like blades positioned on 100-foot-high towers, and the...

Escalating Allergens and Asthma

Although global warming may help some crops and beneficial plants to grow, it also could spur the growth of harmful plants, such as those that produce allergic reactions in many people. Global warming is expected to produce higher levels of carbon dioxide in the atmosphere and warmer temperatures. In addition, this warming will cause spring to arrive earlier in many locations, leading to a longer growing period. All these conditions, researchers say, are expected to cause common plants to...

Human Food and Water Shortages

For humans, climate change may not only diminish seafood from the oceans it also may mean declining water supplies and decreased agricultural productivity. Although some regions may experience floods and rising seas, other parts of the world will In drought-ravaged Moyale, Ethiopia, cattle are led to one of the few remaining watering holes in the region. This lack of water, along with other climate changes, can cause a decline in food production, affecting the lives of millions of people....

The Science of Global Warming

Since the planet was first formed, Earth's climate has constantly changed and evolved, and temperatures have varied widely. Throughout the period of human civilization, however, the world has been enjoying a warm, temperate, and relatively stable climate. This stability has allowed human civilizations, along with countless other species of animals and plants, to proliferate and flourish in recent centuries. The release of carbon and other gases from the burning of fossil fuels in the last...

Criticisms of Al Gores Claims

Global warming skeptics criticize former vice president Al Gore for exaggerating scientific assessments and predictions and presenting an alarmist portrayal of global warming. In a March 13, 2007, article in the New York Times, for example, columnist William J. Broad cited several scientists who criticized Gore's portrayal of global warming as a terrible catastrophe that will cause soaring temperatures, seas that might rise twenty feet, and more frequent and more deadly hurricanes. According to...

Climate Change May Be Natural

The Earth was evidently coming out of a relatively cold period in the 1800s so that warming in the past century may be part of this natural recovery. John R. Christy, climate and atmospheric science expert at the University of Alabama. Testimony of John R. Christy to the Committee on Environmental and Public Works, Department of Atmospheric Science and Earth System Science Laboratory, University of Alabama in Huntsville, July 10, 1997. In the 1980s, largely because of antipollution efforts made...

Signs of Global Warming

Rising global temperatures have already had a major impact on the environment and ecosystems in many regions of the world. The 2007 IPCC report, for example, found that numerous environmental changes can be clearly linked to climate change. Arctic glaciers are rapidly melting, creating more and larger glacial lakes and increased earlier spring runoff into snow-fed rivers. Mountainous regions are experiencing more rock avalanches. And warmer temperatures are causing previously frozen soil,...

Clean Coal and Nuclear Technologies

Because renewable technologies need further development, some experts argue that currently abundant fuel sources, such as coal and nuclear energy, may have to be relied on until better energy sources are available. The United States, for example, already uses coal to produce much of its electricity, and it has enough coal to last another 250 years. President Bush has proposed that more coal plants be built to reduce the country's reliance on foreign oil, but the problem is that coal is a fossil...

The warming Effects of the Industrial Revolution

Global Warming Industrial Revolution

Until recently, humans did not significantly affect the much larger forces of climate and atmosphere. Many scientists believe, however, that with the dawn of the industrial age and the burning of fossil fuels such as coal, natural gas, and oil humans began to significantly add to the amounts of carbon dioxide and other greenhouse gases in the atmosphere, enhancing the planet's natural greenhouse effect and causing higher temperatures. Climate change . . . is the single greatest threat that...

Threat Bigger than Terrorism

Current preoccupation is with terrorism, but in the long term climate change will outweigh terrorism as an issue for the international community. . . . Climate change is going to make some very fundamental changes to human existence on the planet. David Anderson, a former Canadian environment minister. Quoted in CNN.com, Official Global Warming Bigger Threat than Terrorism, February 6, 2004. reut index.html. Since tropical weather is expected to expand as temperatures rise, another health...

Natural Climate Changes

Climate scientists have known since the eighteenth century that Earth's climate can change dramatically due to natural causes. In fact, evidence from ice cores extracted from the Arctic and Antarctic regions show that planetary temperatures have varied by more than 20 degrees Fahrenheit (11.2 degrees Celsius) during the last 350,000 years. Long periods of lower temperatures have resulted in prolonged ice ages that lasted tens of thousands of years. Approximately every 100,000 years, these cold...

Warming

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