Global Warming Global warming is an increase in the average temperature of Earth's surface. Since the late 1800's, the global average temperature has increased about 0.7 to 1.4 degrees F (0.4 to 0.8 degrees C). Many experts estimate that the average temperature will rise an additional 2.5 to 10.4 degrees F (1.4 to 5.8 degrees C) by 2100. That rate of increase would be much larger than most past rates of increase.
Causes of global warming
POPULATION INCREASE DEFORESTATION
1914 2004 PortageGlacier Alaska Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
Colorado River Arizona June 2002 Dec 2003
How Global Warming Works Carbon Dioxide (CO2) Fossil fuels (coal, oil, natural gas) Greenhouse gases
Problems: Harm to ocean life
Changes of habitat
Example Example of the Greenhouse Effect The Sun’s energy passes through the car’s windshield. This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up.
CO2 Pollution and Global Warming Finding the source of increased CO2 in the atmosphere Some scientists have suggested that when the earth was new (about 4.5 billion years ago), CO2 may have made up as much as 80% of the earth's atmosphere. About 2 billion years ago, the concentration of CO2 was likely 20 or 30%. Human life and even most life could not have survived in such an atmosphere. With the evolution of photosynthesizing plants, the concentration of CO2 dropped and the percentage of oxygen in the atmosphere increased. Remember that in photosynthesis: CO2 +H2O + energy from sun ==> O2 + sugar Both plants and animals undergo respiration in which Sugar + O2 ==> CO2 +H20 + energy In addition, when plants and animals die, the dead organisms decay and give off CO2.
Solutions Simple solution
Reduce greenhouse gases emission
Stop dependency on fossil fuels
Solar energy, wind energy and biomass energy
Plant more trees
Individual solutions Spread awareness Turn off your computer or the TV when you’re not using it.
Plant more trees
Solar Power Wind Power Consume much more on…
And also don’t forget fuel efficient cars…
Our Goal Billions of Metric TonsCarbon Produce electricity efficiently Use electricity efficiently Vehicle efficiency Solar and Wind Power Biofuels Carbon capture and storage Gigaton Carbon Reductions in CO2 Per Year 2007