1. Explain how the Earth's atmosphere is similar to a greenhouse.

Double panes help there, because it reduces the amount of heat lost by conduction through the glass. The IR-absorbing properties of the glass are not very important in a greenhouse. But in the atmosphere, the primary energy-retaining effect is via IR absorption by the atmosphere.

chavez's example shows that nonviolent protest can work well. it shows that one nonviolent man can stop a mob, which proves chavez's point and persuades people to protest nonviolently.