Weather: How it Works and why it Matters

abundance activity America amount appears atmosphere average become called carbon dioxide cause century Chapter cities climate clouds cold continue cool covered currents depends difference direction Earth effect energy ENSO entire Europe event example exist fall feet Figure forests fuel gases global greenhouse ground heat Hemisphere human important increase kilometers known land latitude layers less light major mass means measure meters miles million Moon move natural normal North Northern observations occur ocean oxygen ozone past percent period planets Pleistocene precipitation predict present pressure produce radiation rain reached recent records regions relative remain result rise scale seasons snow solar storms stratosphere summer surface temperature tion trees Tropics United vapor variations volcanic warming weather wind winter