Changing the weather, once thought to be an impossible task, now appears may be possible on a small scale. But many major problems are unsolved. The present efforts cluster around one or more of six objectives: (1) increasing rainfall or snowfall; (2) inhibiting the fall of hail; (3) dissipating fog; (4) curbing lightning; (5) controlling hurricanes and other violent storms; (6) changing the climate over large regions. These topics are discussed in this article. Rain can be increased in local areas and holes can be produced in clouds. But most of the other objectives are far from being accomplished and, if accomplished in one area, might lead to disaster in another.