What is Global Warming? Global warming is the warming up of the planet above the temperature it should be under normal circumstances. There are indications that melting of the Greenland Ice Sheet has accelerated dramatically in the last few decades. www.net.org/warming/stills.html The one constant of climate has been change by natural forces. What is new is that human activities are altering the composition and size of the atmosphere, the face of the land, and the climate system. What do you know about a What is the greenhouse? Greenhouse The Greenhouse Effect is the trapping of heat near Earth’s Effect? surface by certain gases, such as water vapor and CO2. Why is this a problem? If greenhouse gases did not trap heat the Earth would be much cooler. So it’s a good thing! Or is it? Consequences of Climate Change What do you think is happening and will continue to happen due to climate change? 1)Parts of the Earth’s Ice Caps will melt. 2)Rise in ocean levels which will cause flooding 3) If coastal areas flood this affect where crops area grown. Photo courtesy of www.funnyandjokes.com So what’s the big deal? Antarctica used to be hot and now its cold. Why is that so important? And what does that have to do what’s happening in Antarctica and around the world now? Larson B Ice Shelf in Antarctica photo courtesy of www.earthobservatory.nasa.gov.