Global warning KIs ziv ke karan utpan hua hindi answer
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The basic physics of global warming are as well understood as any scientific phenomenon. The Earth’s average surface temperature is rising unnaturally and frighteningly fast, threatening to snuff out a staggering number of plants and animals in the very near future and have far-reaching impacts on human civilization — with many endangered species already feeling the heat. Scientific consensus points squarely at human activity as global warming’s driver. But we can fight to stop a total global climate catastrophe, and understanding what’s happening is the first step.
Certain gases in the atmosphere are called greenhouse gases — specifically, carbon dioxide, methane, nitrous oxide, tropospheric ozone, and CFCs — because they allow shortwave radiation from the sun to pass through the atmosphere and warm the Earth’s surface. The energy that then radiates out from the surface, longwave radiation, is trapped by the same greenhouse gases, warming the air, oceans, and land. This process, appropriately dubbed “the greenhouse effect,” is how global warming occurs. Black carbon, a particle rather than a gas, also has a very large warming impact.
The greenhouse effect itself isn’t a bad thing. In fact, Earth could never have become warm enough to sustain life without it. But in the late 18 th century, the advent of fossil fuels set off a chain reaction. When coal, oil, and natural gas are burned, they release enormous amounts of greenhouse gases — especially carbon dioxide, or CO2, which is by far the most prevalent. The gases add up much faster in the atmosphere than natural processes can absorb them, and thereby wreak havoc on Earth’s complex climate system. After the Industrial Revolution changed everything from goods manufacturing to land use to lighting and heating methods, fossil fuel combustion increased dramatically — and then came cars, which now join coal-burning power plants as one of the top emitters of greenhouse gases. Combined with massive population growth and the effects of large-scale deforestation and industrial agriculture, the widespread combustion of fossil fuels has made greenhouse gas concentrations in the atmosphere climb to levels never seen before in the more than 200,000-year history of the human subspecies.
Humans have added so dramatically to the atmospheric blanket of greenhouse gases that the greenhouse effect that first made life possible now threatens the world as we know it.