In fact, since at least as far back as Aristotle, the basic formula for comedy has had more to do with conventions and expectations of plot and character than with a requirement for lewd jokes or cartoonish pratfalls. In essence: A comedy is a story of the rise in fortune of a sympathetic central character.
The Acid Rain Problem. Carbon dioxide in the air can dissolve in rain water to form carbonic acid, H 2 CO 3. CO 2 + H 2 O H 2 CO 3. Carbonic acid is a weak acid. It partially ionises to form hydrogen ions. H 2 CO 3 H + + HCO 3 -. The hydrogen ions from carbonic acid give natural rain water a slightly acid pH value of 5.6.
It is significant that so much carbon dioxide stays in the atmosphere because CO 2 is the most important gas for controlling Earthâs temperature. Carbon dioxide, methane, and halocarbons are greenhouse gases that absorb a wide range of energyâincluding infrared energy (heat) emitted by the Earthâand then re-emit it.The re-emitted energy travels out in all directions, but some returns to Earth, where it heats the surface.arbon dioxide causes about 20 percent of Earthâs greenhouse effect; water vapor accounts for about 50 percent; and clouds account for 25 percent. The rest is caused by small particles (aerosols) and minor greenhouse gases like methane.