The Earth and its atmosphere -- Energy : warming the Earth and the atmosphere -- Seasonal and daily temperatures -- Atmospheric humidity -- Condensation : dew, fog, and clouds -- Stability and cloud development -- Precipitation -- Air pressure and winds -- Wind : small scale and local systems -- Wind : global systems -- Air masses and fronts -- Middle-latitude cyclones -- Weather forecasting -- Thunderstorms and tornadoes -- Hurricanes -- The Earth's changing climate -- Global climate -- Air pollution -- Light, color, and atmospheric optics.