Ozone is a molecule of 3 oxygen atoms

§ Ozone is a molecule of 3 oxygen atoms § CFC’s chloro-flouro-carbons: human made gases in air conditions spray cans and other things § They were banned in 2000. § The ozone layer hole is gradually closing as a result of the ban. What caused the hole in the ozone layer?

§ The gases in the atmosphere let the suns heat in and allow only some of it back out. § Like in a car in FL in summer with the windows rolled down § What happens if you roll up the windows with no AC? How does the atmosphere keep earth warm?

§ Global warming is the gradual increase in the temp of the earths atmos. Increasing levels of greenhouse gases are causing global temps to rise more quickly. § Droughts and desertification: water and food shortages in areas that get very warm and dry § Changes to biosphere: as climates warm organisims will get pushed to new locations. They may not adapt or have strong competition § Rising sea levels: warm water expands causing sea levels to rise § Melting glaciers which also contributes to sea levels rising What are the effects of rising temperatures? (global warming)

§ Clean energy sources: those that release small amounts of greenhouse gases, or none such as solar energy and wind energy § Energy efficiency: if it is more efficient we need less of it § Carbon Capture: technology to remove carbon from exhaust and then bury it. It is expensive but releases fewer greenhouse gases. How can we limit Global Warming?