global mean temperature increase with the rapid increase of CO2 emission. Cause of Global Warming. Fossil fuel consumption is increasing rapidly to satisfy . PDF | Many researchers, engineers and environmentalists are expressing deep Because of the treacherous effects of global warming, some solutions must be . Signs of global warming in the United States, region by region iv. Executive summary v. Introduction. 1. Part I: Extreme events. 3. Killer heat waves. 3. Torrential.

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    Global Warming Pdf

    Introduction. Global warming is in the news. While scientists agree that temperatures are rising, they disagree as to the causes and the rate of change. SUNITA NARAIN. GLOBAL WARMING. IN AN UNEQUAL WORLD a case of environmental colonialism. CENTRE FOR SCIENCE AND ENVIRONMENT. But global warming is also a very complicated and difficult issue that . SOURCE : Danish Meteorological Institute,

    And yes, it's really happening. Over the past 50 years, the average global temperature has increased at the fastest rate in recorded history. And scientists say that unless we curb global-warming emissions, average U. Q: What causes global warming? Normally, this radiation would escape into space—but these pollutants, which can last for years to centuries in the atmosphere, trap the heat and cause the planet to get hotter. That's what's known as the greenhouse effect. In the United States, the burning of fossil fuels to make electricity is the largest source of heat-trapping pollution, producing about two billion tons of CO2 every year. Coal-burning power plants are by far the biggest polluters.

    Detection does not imply attribution of the detected change to a particular cause. Source: NASA GISS The graph above shows the average of a set of temperature simulations for the 20th century black line , followed by projected temperatures for the 21st century based on three greenhouse gas emissions scenarios colored lines. Easterling et al.

    10 Human Causes of Global Warming for 2019

    This projection is relative to global temperatures at the end of the 20th century. Global surface temperature for the past 5. The last , years are expanded in the lower half of the figure image credit: NASA. Three would be expected to decrease and they are, in fact, decreasing. Each of the different colored lines in each panel represents an independently analyzed set of data. The data come from many different technologies including weather stations , satellites , weather balloons , ships and buoys.

    Some of the graphs show a positive trend , e. Other graphs show a negative trend, e.

    Global warming

    Evidence of warming is also apparent in living biological systems. With medium confidence see footnote 1 , IPCC [60] concluded that human influences had contributed to an increase in heavy precipitation events at the global scale.

    Projections of future changes in precipitation show overall increases in the global average, but with substantial shifts in where and how precipitation falls. Extremely hot nights have doubled in frequency.

    The area in which extremely hot summers are observed, has increased fold. These changes are not explained by natural variability, and attributed by climate scientists to the influence of anthropogenic climate change.

    Heat waves with high humidity pose a big risk to human health while heat waves with low humidity lead to dry conditions that increase wildfires. The mortality from extreme heat is larger than the mortality from hurricanes, lightning, tornadoes, floods, and earthquakes together [69] See also heat wave.

    Tropical cyclones At the global scale, the frequency of tropical cyclones will probably decrease or be unchanged. Some impacts will be beneficial—e.

    Cryosphere See also: Retreat of glaciers since A map of the change in thickness of mountain glaciers since Thinning in orange and red, thickening in blue. The products used by humans contribute to more than 60 percent of greenhouse gas emissions and as much as 80 percent of total land, water and material use.

    In addition to the energy it takes to produce all the stuff we buy, keeping it going and using it to its fullest requires even more energy. In the U. But just as with most industries, humans have created too much of a good thing, and overfishing is putting the oceans at risk. Human population growth and resulting overfishing are depleting natural marine stocks, which impacts the health and biodiversity of the entire ocean.

    Global share of marine stock fished to within sustainable levels Use of Aerosols Though some forms of aerosols have been banned in many countries, other forms of them still are in wide use. These products are loaded with greenhouse gases, including CO2 and methane, as well as chlorofluorocarbons, which erode the ozone layer.

    Production of aerosols has actually increased throughout the world, with most aerosols being produced in Europe. Aerosol production by region or country millions of units, Inability to Change Even if we addressed every single other issue on this list today, the impact of human-caused global warming will remain for decades, if not centuries.

    The magnitude of the issue is, quite simply, too difficult for many of us to comprehend. But humans are capable of change, as shown by the reduction in fuel combustion emissions seen in many countries since the early s, including the United States, and by evolving public attitudes toward climate change and our role in it. In addition to urging action by political leaders and those running for office, what else can average people do? Fly sparingly, carpool and take public transit.

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    Keep your current car as long as possible; if you must buy a new one, consider a hybrid. Recycle as much as you can, and buy recycled items. Department of Transportation proposed carbon pollution and fuel economy standards intended to cut emissions through the s, under Trump administration, the DOT is working to roll back those clean vehicle safeguards that protect the climate and our health. Fortunately, state leaders—including in car country itself—recognize that clean transportation must remain a priority if we are to address the costly risks of climate change and protect public health.

    And regional efforts around the country are helping to boost the electric car market , which saw an increase in sales for over Our clean energy economy is growing too, despite federal efforts to derail it.

    In , wind employment grew by 32 percent and solar jobs increased by 25 percent. Globally, at the United Nations Conference on Climate Change in Paris, countries—including the United States, at the time—agreed to pollution-cutting provisions with a goal of preventing the average global temperature from rising more than 1. Scientists say we must stay below a two-degree increase to avoid catastrophic climate impacts. Under the terms of the Paris agreement, participating nations will meet every five years, starting in , to revise their plans for cutting CO2 emissions.

    Beginning in , they will also have to publicly report their progress.

    Global warming - Wikipedia

    More than 25 cities in 17 states, with populations totaling more than 5 million have adopted resolutions that will enable them to get percent of their electricity from renewable sources like wind and solar. Even better, a new initiative by former New York City mayor Michael Bloomberg gives the urban layer of this movement a boost. Q: Is global warming too big of a problem for me to help tackle?

    Make conserving energy a part of your daily routine and your decisions as a consumer. When you buy a car, look for one with the highest gas mileage and lowest emissions. You can also reduce your emissions by taking public transportation or carpooling when possible. And while new federal and state standards are a step in the right direction, much more needs to be done.

    Demand Climate Action.


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