consiquences of global warming
Answers
Answer:
lack of oxygen , lack of water , excess use of chemicals , lack of rain ,
increase in carbondioxide , ozone depletion , etc........
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Answer:
what is global warming
Explanation:
What Is Global Warming?
Global warming is the increase in the average temperature of Earth's near-surface air and oceans since the mid-20th century and its projected continuation caused chiefly by increasing concentrations of greenhouse gases namely Carbon Dioxide, Methane, Nitrous Oxide, Hydro fluorocarbons (HFCs), Per fluorocarbons ( PFCs), Sulphur Hexafluoride(SF6) resulting from human activities such as burning of fossil fuels, deforestation, industrial processes and other sources.
The Greenhouse Effect:
The Greenhouse Effect refers to the gradual warming of the Earth's atmosphere. The earth with its blanket of atmosphere constitutes a 'Greenhouse' according to some climatologists. Greenhouse Gases (GHGs) trap the heat radiated off the surface of the earth,in the earth's atmosphere and thus result in increasing the temperature of earth. Greenhouse Gases have always been present in the atmosphere but their concentrations have increased in the last century.
Joseph Fourier first discovered the Greenhouse effect in 1824 and Svante Arrhenius was the first to investigate it in 1896.
Causes of Global Warming:
The Intergovernmental Panel on Climate Change in its 4th Assessment Report has stated that most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations. A major portion of the Greenhouse Gases come from the combustion of fossil fuels in automobiles (transportation), power factories, manufacturing industries and during industrial processes.
Agricultural sector, burning of agriculture residues and waste disposal are smaller contributors of such emissions. It has been widely agreed upon by a majority of climatologists that human activities are responsible for most of the warming since they enhance the Earth's natural greenhouse effect. Natural factors like solar activity and volanic emissions have made an almost insignificant contributions Global warming over the past century.
Effects of Global Warming:
The average facade temperature of the globe has increased more than 1 degree Fahrenheit since 1900 and the speed of warming has been almost three folds the century long average since 1970. Global Environmental Change caused by Global Warming is expected to have and has already resulted in an adverse impact on the ecosystem. The percentage of Carbon Dioxide, which is considered the primary contributor to the 'Greenhouse Effect' 'has risen by over 25% since the Industrial Revolution. At the current rate of increase, it is estimated that the Greenhouse Effect will hike up global temperatures by about 4 degrees.
A rise in global temperatures is expected to cause several changes and damaging effects the foremost among them being Rise in Sea levels. Continued Global warming over centuries may melt large amounts of ice from a vast sheet that covers most of West Antarctica. Coastal areas would experience rise in sea levels, flooding, erosion threatening submergence of some coastal cities and small uninhabited islands.
According to the United Nations climate panel, cities like Mumbai and Kolkata could be submerged and islands like the Maldives, Tuvalu, Haiti could disappear, or become uninhabitable at the current rate of rise in temperatures.