WHAT IS GLOBAL WARMING ?

 

       ·       Global warming refers to the exceptionally rapid rise in the Global temperatures during the last century, attributable mostly to greenhouse gases created by mankind burning fossil fuels.

·       The phenomena of steady increases in temperature near the earth's surface is known as global warming. Over the last one or two centuries, this phenomena has been noticed. The earth's climate pattern has been disrupted as a result of this alteration. The notion of global warming, on the other hand, is divisive, but scientists have produced evidence to support the fact that the earth's temperature is steadily rising.

·       Between 1906 and 2005, the earth's average temperature increased by 0.6 to 0.9 degrees Celsius (1.1 to 1.6 degrees Fahrenheit), with the pace of growth virtually doubling in the previous 50 years. Temperatures are expected to rise even higher.

 

 

(NASA figure adapted from Goddard Institute for Space Studies Surface Temperature Analysis.)

Is Current Warming Natural?

Before the Industrial Revolution, the climate of the Earth altered owing to natural factors unrelated to human activities. Most of the time, fluctuations in sunshine have caused global climate change. Tiny wobbles in Earth's orbit changed the timing and location of sunlight falling on the planet's surface. Variations in the Sun's output have boosted and lowered the quantity of solar energy reaching Earth on a regular basis. Volcanic eruptions produce particles that reflect sunlight, illuminating the earth while also lowering the environment. Volcanic activity has also contributed to episodes of global warming in the past by increasing greenhouse gases over millions of years. Because the ozone layer absorbs ultraviolet light, the stratosphere warms during solar maxima; more ultraviolet radiation during solar peak value equals warmer temperatures. Ozone depletion accounts for the majority of the stratospheric cooling in recent decades, but it does not account for all of it. Increased carbon dioxide levels in the troposphere and stratosphere work synergistically to cool the stratosphere.