Abstract

Dr. D. K. Awasthi* and Gyanendra Awasthi

ABSTRACT

Climate change occurs when changes in earth’s climate system result in new weather patterns that last for at least a new decades ,may be for millions of years. come a widespread topic in recent years. This problem that resulted from the emission of greenhouse gases that affected our environment. Therefore, it raises question on whether the problem is caused by human activities or it’s just a part of nature’s cycle. The climate system receives nearly all of its energy from the sun, with a relatively tiny amount from earth’s interior The balance of incoming and outgoing energy ,the passage of the energy through the climate system, determines Earth’s Energy Budget. When the incoming energy is greater than the outgoing energy, earth’s energy budget is positive and the climate system is warming .if more energy goes out, the energy budget is negative and earth experience cooling .climate can be measured at many geographic scales for example cities, countries, or the entire globe—by such statistics as average temperature, average number of rainy days, and the frequency of droughts .climate change refers to changes in these statics over years, decades, or even centuries. The overwhelming majority of climate scientists agree that human activities, especially the burning of fossil fuels (coal ,oil and gas),are responsible for most of the climate change currently being observed. Scientists have given information for more than century that emissions from the burning of fossil fuel could lead to increase in the Earth’s average surface temperature .NASA’S Global surface temperature Record estimate that Earth’s average surface temperature has increased by more than1.40F(0.80C)over the past 100 years ,with much of this increase taking place over the past 35 years. The green house gases are carbon dioxide(CO2),Methan (CH4),Nitrous oxide(N2O),and water vapour .Human activities---especially burning fossil fuel---are increasing the concentrations of many of these gases, amplifying the natural greenhouse effect .Swedish scientist Svante Areehenius predicted that if human activities increased co2 levels in the atmosphere, a warming treand would result.Green house gases trap more infrared energy in the atmosphere than occurs naturally .Heat(infrared energy)radiates out ward from the warmed surface of the surface of the Earth.