What are greenhouse gases?a.Gases that warm a planet’s surface by absorbing outgoing infrared radiation- radiant heat- and reradiating some of it back towards the surfaceb.Carbon dioxide, methane, nitrous oxide, chlorofluorocarbon compounds
What is greenhouse effect?a.A natural physical process that operates in all planetary atmospheres
What is global warming?a.A warming of the earth’s atmosphere due to anthropogenic enhanced of the green house effect
4.What are the four fundamental components of the Earth system?
a.Atmosphereb.Hydrosphere: waterc.Biota: all living organismsd.Solid Earth
5.What are the three major global environmental changes that are occurring?
6.What do figure 1-2 and 1-3 tell us about CO2 concentration?