Fluorescent lights, including compact fluorescents, generate only one-fifth as much greenhouse gas as ordinary globes producing the same amount of light.
Air conditioning is largely responsbile for the need to build big new power stations that are used only for a small amount of the time of the year in peak demand periods. We all pay.
Buying tip: Look for dishwashers with internal booster heaters, so that you can set your water heater thermostat at 120°F (rather than 140°F for dishwashing purposes).