Global warming :A global concern BY :-Govind Manglani Email : email@example.com m
Is the world getting warmer? If so, are the actions of mankind to blame for earth’s temperature increases? What can/should be done about these issues?
Global warming or climate change is the gradual increase of the average temperature of the Earth The average temperature of the Earths surface is around 59˚F or 13 ˚C. Greenhouse Gases in the atmosphere hold in heat Without these gases, the Earth’s surface temperature would drop to around 0 ˚F
Earth formed ~4.6 billion years ago Originally very hot Sun’s energy output only 70% of present Liquid water present ~4.3 billion years
Life appeared ~3.8 billion years ago Photosynthesis began 3.5-2.5 billion years ago ◦ Produced oxygen and removed carbon dioxide and methane (greenhouse gases) ◦ Earth went through periods of cooling (“Snowball Earth”) and warming Earth began cycles of glacial and interglacial periods ~3 million years ago
8Carbon (109 metric tons) Total 7 Liquid fuel 6 Solid fuel Gas fuel 5 4 3 2 1 0 1750 1800 1850 1900 1950 2000 Year
Estimated carbon emitted per yearAtmospheric CO2 has increased 26%since the industrial revolution, largelydue to fossil fuel combustion anddeforestation. The annual increase inCO2 can be estimatedfrom emissionsM=4x∏xr2P/g= 55.2538 x 1018 kg.
8Carbon (109 metric tons) Annual carbon emissions Atmospheric CO2 6 Atmospheric CO2 average 4 2 0 1955 1965 1975 1985 1995 2005 Year
Increasing CO2 emissions, especially in China and developing countries Likely to double within 150 years: ◦ Increased coal usage ◦ Increased natural gas usage ◦ Decreased petroleum usage (increased cost and decreasing supply)
Water levels will rise in oceans The timing of the seasons will change Increased spread of disease Stronger hurricanes and storms Animals change behavior
Forests BiodiversityImpact of rise intemperature of 1.8oC to4oC Agriculture Coastlines
Flat 0.8 0.6D Mean Temperature (°C) 0.4 Decreasing Flat 0.2 0.0 -0.2 -0.4 -0.6 1880 1900 1920 1940 1960 1980 2000 Year
Rajasthan- Drought Rann of Kutch – sea level rise Mumbai-Salt water intrusion Kerala –Productivity of Forest Tamil Nadu-Coral bleaching
MELTING OF ICE Which adversely Effect the life of endangered species
Use fluorescent lighting in your home Drive a hybrid car Use alternative energy sources for electricity and heat Green roofs
The impacts of climate change are not evenly distributed – the poorest countries and people will suffer earliest and most. And if and when the damages appear it will be too late to reverse the process. Thus we are forced to look a long way ahead.