Are Humans Responsible for Global Warming - 2365 Words

Are Humans Responsible for Global Warming? A REVIEW OF THE FACTS APRIL 2007 AUTHORS James Wang, Ph.D. Bill Chameides, Ph.D. Are Humans Responsible for Global Warming? The case for attributing the recent global warming to human activities rests on the following undisputed scientific facts: †¢ Carbon dioxide (CO2) is a greenhouse gas that warms the atmosphere. †¢ Since pre-industrial times, atmospheric CO2 concentrations have increased from about 280 parts per million (ppm) to over 380 ppm. Current concentrations of CO2 and other greenhouse gases are unprecedented in at least the last 650,000 years, based on records from gas bubbles trapped in polar ice. †¢ Independent measurements demonstrate that the increased CO2 in the atmosphere comes†¦show more content†¦The Facts The Medieval Warm Period (MWP) refers to a relatively warm period lasting from about the 10th to the 14th century.2 However, the initial evidence for the MWP was largely based on data3 gathered from Europe, and more recent analyses indicate that the MWP was not a global phenomenon. A number of reconstructions of millennium-scale global temperatures have indicated that the maximum globally averaged temperature during the MWP was not as extreme as present-day temperatures and that the warming was regional rather than global. Perhaps the most well-known of these is that of Michael Mann and colleagues (Nature, 392, 1998, pg. 779). Their reconstruction produced the so-called â€Å"hockey stick† graphic that contributed to this conclusion in the 2001 assessment of the Intergovernmental Panel on Climate Change: â€Å"The†¦Medieval Warm Period appear(s) to have limited utility in describing trends in hemispheric or global mean temperature changes in past centuries. The accuracy of the â€Å"hockey stick† graphic was widely discussed in the press when the Mann et al. methodology was criticized by McIntyre and McKitrick (Geophys. Res. Lettr, 32, 2005, pg. L03710). Less attention was given to subsequent studies, such as that of Moberg and colleagues (Nature, 433, 2005, pg. 613) and Osborn and Briffa (Science, 311, 2006, pg. 841) that were based on different, independent methodologies but reached conclusions similar to Mann. Observations of melting high altitude glaciers areShow MoreRelatedHumans Are Responsible For Global Warming877 Words   |  4 Pagessurprising to read on the internet about ice caps melting and strong storms devastating cities. Global warming is a serious issue that should be put in consideration. However, before trying to fix such issue. We should focus on what is causing global warming. Humans are responsible for global warming. Even though, most of the earth’s population deny being responsible for global contamination/glo bal warming. A slight change on temperature can cause a big change on the earth’s weather and environmentRead MoreHumans Are Responsible For Global Warming2056 Words   |  9 PagesDraft Humans are Responsible for Global Warming On November 8th, American citizens will go to the polls and vote for the next president of the United States. During the presidential campaign, both candidates, Hillary Clinton and Donald Trump, have their own different points of view on environmental issues. Hillary Clinton affirms her commitment to the fight against climate change. She supports the Paris Agreement, which is an agreement among many nations to respond to the threat of global warmingRead MoreEssay on Humans are Responsible for Global Warming972 Words   |  4 PagesThis essay offers a defense to the position that humans are responsible for global warming. What is Carbon Dioxide? Before attempting to answer any questions based on observations about carbon dioxide, taking a moment to identify the carbon dioxide helps to ensure a clear understanding of the element. According to Princeton University (n.d.), â€Å"carbon dioxide, carbon dioxide, is a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances†. This naturallyRead MoreHuman Activity Responsible For Global Warming Essay1948 Words   |  8 Pagesenvironment varies. Everyone adapts to alterations differently, but is human activity responsible for global warming negatively affecting human health? Background: Historical Background †¯Ã¢â‚¬ ¯Ã¢â‚¬ ¯Ã¢â‚¬ ¯Ã¢â‚¬ ¯Ã¢â‚¬ ¯ At the beginning of the twentieth century, when global warming was merely a thought to occur among the presence of the greenhouse effect, scientists started to believe it would good for the environment to experience global warming. During the late 1950s, a couple of scientists took further examinationsRead MoreIs Human Activity Primarily Responsible For Global Climate Change And Global Warming?1371 Words   |  6 PagesIs Human Activity Primarily Responsible for Global Climate Change and Global Warming? What is global climate change? Is human activity primarily responsible? According to the United States Environmental Protection Agency, global warming â€Å"refers to the recent and ongoing rise in global average temperature near Earth s surface. It is caused mostly by increasing concentrations of greenhouse gases in the atmosphere. Global warming is causing climate patterns to change. However, global warming itselfRead MoreThe Effects Of Global Warming On Earth1577 Words   |  7 Pagesto be. It is known as global warming. Global warming is constant rise in the global average temperature near the surface of the earth. Although to some, global warming is nothing more than a myth, a rumor to scare the race into rethinking their selfish acts, but global warming is no myth. I believe that global warming is far from a myth, it is real and it is dangerous. The evidence is all around us. If you look to the stars, you can see that the atmosphere is full of human-produced molecules thatRea d MoreThe Debate On Global Climate Change1605 Words   |  7 PagesThe debate on global climate change argues that human-generated greenhouse gas emissions are too small to substantially change the earth’s climate and that the planet is capable of absorbing those increases. It is contended that warming over the 20th century resulted primarily from natural processes such as fluctuations in the sun s heat and ocean currents. But the theory of human-caused global climate change is based on questionable measurements, faulty climate models, and misleading science. InRead MoreReview of The Great Global Warming Swindle1281 Words   |  6 Pages The Great Global Warming Swindle has been the most widely watched documentary critical of the scientific consensus that climate change is due to anthropogenic activities. Aired in 2007 in the United Kingdom, the documentary claimed to debunk the â€Å"myth† of manmade global climate change, exposing it as a vast conspiracy design ed to gain funding for research and push an environmental agenda that is especially harmful to the developing world. Directed by British producer Martin Durkin, the documentaryRead MoreCauses Of Environmental Issues1467 Words   |  6 Pagescare. However, the global issues around the world are the most serious and concerning problems. According to Globe scan, 64% out of 25,000 people said environmental issue is the most serious problem. Like other issues, environmental issue is a growing problem around the whole world. Some people know and say that humans have to save the Earth, but how many of them actually keep those rules to save it? For that reason, environmental issue is an ongoing problem, and global warming is the huge and significantRead MoreThe Debate On Global Warming1239 Words   |  5 Pagescontroversy concerning global warming. The controversy takes the form of public debate that centers on five issues (Mazo 30). The first issue is whether or not global warming is occ urring. The second issue is whether global warming is real and extent it has occurred in the recent decades. The third question relates to the causes of global warming. The fourth question centers on the effects of global warming. The fifth question is whether any action needs to be taken to contain global warming. The author concurs