Global warming is a phenomenon where the earth’s average temperature rises due to increased amounts of greenhouse gases. Greenhouse gases such as carbon dioxide, methane and ozone trap the incoming radiation from the sun. This effect creates a natural “blanket” which prevents the heat from escaping back into the atmosphere · June 24, by Prasanna. Paragraph On Global Warming: Global warming is the rise of average global temperature on the surface of the earth. It has been recognized as a severe threat to the environment since the s. The rate of increase in global temperatures sees accelerated growth for the last 5 decades · Actually, global warming is the continuous rise in earth temperature, due to some greenhouse gases like carbon dioxide, water vapours, nitrous oxide, methane etc. This rise of temperature ultimately hurts the life of human beings, animals and plants. The main cause of global warming is the greenhouse effect
Global Warming | National Geographic Society
Glaciers are meltingsea levels are rising, cloud forests are dyingand wildlife is scrambling short paragraph on global warming keep pace. It has become clear that humans have caused most of the past century's warming by releasing heat-trapping gases as we power our modern lives. Called greenhouse gases, their levels are higher now than at any time in the lastyears.
We often call the result global warming, but it short paragraph on global warming causing short paragraph on global warming set of changes to the Earth's climate, or long-term weather patterns, that varies from place to place. Climate change encompasses not only rising average temperatures but also extreme weather eventsshifting wildlife populations and habitats, rising seasand a range of other impacts. All of those changes are emerging as humans continue to add heat-trapping greenhouse gases to the atmosphere, changing the rhythms of climate that all living things have come to rely on.
What will we do—what can we do—to slow this human-caused warming? How will we cope with the changes we've already set into motion? While we struggle to figure it all out, the fate of the Earth as we know it—coasts, forests, farms, short paragraph on global warming, and snow-capped mountains—hangs in the balance. The "greenhouse effect" is the warming that happens when certain gases in Earth's atmosphere trap heat.
These gases let in light but keep heat from escaping, like the glass walls of a greenhouse, hence the name. Sunlight shines onto the Earth's surface, where the energy is absorbed and then radiate back into the atmosphere as heat. In the atmosphere, greenhouse gas molecules trap some of the heat, and the rest escapes into space. The more greenhouse gases concentrate in the atmosphere, the more heat gets locked up in the molecules.
Scientists have known about the greenhouse effect sincewhen Joseph Fourier calculated that the Earth would be much colder if it had no atmosphere. This natural greenhouse effect is what keeps the Earth's climate livable. Without it, the Earth's surface would be an average of about 60 degrees Fahrenheit 33 degrees Celsius cooler. Inthe Swedish chemist Svante Arrhenius discovered that humans could enhance the greenhouse effect by making carbon dioxidea greenhouse gas. He kicked off years of climate research that has given us a sophisticated understanding of global warming.
Levels of greenhouse gases have gone up and down over the Earth's history, but they had been fairly constant for the past few thousand years. Global average temperatures had also stayed fairly constant over that time— until the past years. Through the burning of fossil fuels and other activities that have emitted large amounts of greenhouse gases, particularly over the past few decades, humans are now enhancing the greenhouse effect and warming Earth significantly, and in ways that promise many effectsscientists warn.
Human activity isn't the only factor that affects Earth's climate. Volcanic eruptions and variations in solar radiation from sunspots, solar wind, and the Short paragraph on global warming position relative to the sun also play a role.
So do large-scale weather patterns such as El Niño. Changes in solar radiation levels as well as minute particles suspended in the atmosphere from volcanic eruptionsfor example, have contributed only about two percent to the recent warming effect. The balance comes from greenhouse gases and other human-caused factors, such as land use change. The short timescale of this recent warming is singular as well. Volcanic eruptionsfor example, short paragraph on global warming, emit particles that temporarily cool the Earth's surface.
But their effect lasts just a few years. Events like El Niño also work on fairly short and predictable cycles. On the other hand, the types of global temperature fluctuations that have contributed to ice ages occur on a cycle of hundreds of thousands of years. For short paragraph on global warming of years now, emissions of greenhouse gases to the atmosphere have been balanced out by greenhouse gases that are naturally absorbed.
As a result, greenhouse gas concentrations and temperatures have been fairly stable, which has allowed human civilization to flourish within a consistent climate. Now, humans have increased the amount of carbon dioxide in the atmosphere by more than a third since the Industrial Revolution, short paragraph on global warming. Changes that have historically taken thousands of years are now happening over the course of decades.
Also, a new and more unpredictable climate poses unique challenges to all life. Historically, short paragraph on global warming, Earth's climate has regularly shifted between temperatures like those we see today and temperatures cold enough to cover much of North America and Europe with ice. The difference between average global temperatures today and during those ice ages is only about 9 degrees Fahrenheit 5 degrees Celsiusand the swings have tended to happen slowly, over hundreds of thousands of years.
But with concentrations of greenhouse gases rising, short paragraph on global warming, Earth's remaining ice sheets such as Greenland and Antarctica are starting to melt too.
That extra water could raise sea levels significantly, and quickly. Bysea levels are predicted to rise between one and 2. As the mercury rises, the climate can change in unexpected ways. In addition to sea levels rising, weather can become more extreme.
This means more intense major storms, more rain followed by longer and drier droughts—a challenge for growing crops—changes in the ranges in which plants and animals can live, and loss of water supplies that have historically come from glaciers.
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· Actually, global warming is the continuous rise in earth temperature, due to some greenhouse gases like carbon dioxide, water vapours, nitrous oxide, methane etc. This rise of temperature ultimately hurts the life of human beings, animals and plants. The main cause of global warming is the greenhouse effect · The short timescale of this recent warming is singular as well. Volcanic eruptions, for example, emit particles that temporarily cool the Earth's surface. But their effect lasts just a few years · June 24, by Prasanna. Paragraph On Global Warming: Global warming is the rise of average global temperature on the surface of the earth. It has been recognized as a severe threat to the environment since the s. The rate of increase in global temperatures sees accelerated growth for the last 5 decades
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