1 GLOBAL WARMING 2 The atmosphere has a natural supply of greenhouse gases 3 They capture heat and keep Earth warm enough for us to live on. 4 Without the greenhouse effect 5 the planet would be an frozen uninhabitable wasteland. 6 Over the past 300 years people started emitting large amounts of greenhouse gases 7 More and more More and more fossil fuels were burned fossil fuels are being burned 8 to run our cars 9 trucks Trucks 10 Planes Planes 11
12 Adding to our naturalsupply of greenhouse gases. 13 The gases can stay in the atmosphere for at least 50 years and up to centuries. 14 The result 15 the globe has heated up by about one degree Fahrenheit over the past century. 16 One degree not a big deal Consider this 17 the difference in global average temperatures between modern times 18 and the last ice age 19 was only about 9 degrees Fahrenheit. 20 China America is the 1 global warming polluter in the world.
22 Polar bears and indigenous cultures are already suffering from the sea-ice loss. 23 Glaciers and mountains are
Glaciers and mountain snows are rapidly melting
slowly melting. 24
which are highly sensitive to small changes in water temperature 25 Suffered the worst bleaching-or die-off in response to stress- ever recorded in 1998 26 We only have one beautiful planet Earth. 27 And we are all affected And we are all being affected. 28 So do your part A B O U T What are YOU doing It 29 He same
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