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GLOBAL WARMING Our Responsibility Toward Climate Change Global Warming “Not only is it real, it's here, and its effects are giving rise to a frighteningly new global phenomenon: the man-made natural disaster. – Barack Obama Outline and Objectives Global Warming The scientific research
“Not only is it real, it's here, and its effects are giving rise to a frighteningly new global phenomenon: the man-made natural disaster.
– Barack Obama
The earth is getting warmer. The average temperature has risen about 1 degree Fahrenheit in the last century and the rate at which the temperature is rising is accelerating.
and has kept the Earth's
temperature about 60 F° warmer than it would otherwise be.
Earth’s greenhouse gases:
Venus is too hot,
Mars is too cold,
but Earth is just right.
People began altering the climate during the Industrial Revolution in the late 18th and early 19th century.
Now through population growth, fossil fuel burning, and deforestation, we are affecting the mixture of gases in the atmosphere.
Deforestation in Brazil has earned it a spot as one of the leading carbon dioxide emitting countries.
Trash in landfills, animals, and deforestation all produce methane gas.
60% of global methane emissions are related to human-related activities
Fuel combustion is the main source of Ozone
CFC’s were once widely used in aerosols and refrigerators
The use of CFC’s as a coolant has been discontinued, but the effects of the damage done will persist for thousands of years
Argentina's Upsala Glacier was once the biggest in South America, but it is now disappearing at a rate of 200 meters per year.
The common lawn weed deadnettle, photographed at the National Arboretum, is blooming an average of 39 days earlier than in 1970.
A study showed the egg laying date of North American tree swallows advanced by up to nine days during the period from 1959 to 1991.
Tree swallows across North America are breeding earlier, the most likely cause is a long term increase in spring temperature.
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Climate change is a global problem.
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Congress has passed:
Numerous state and local governments have enacted similar legislation, either implementing federal programs or filling in locally important gaps in federal programs.
President Bush signs the Clean Air Act Amendments - Nov. 15, 1990 (Source: White House, photo by Carol T. Powers)