What's all this about water shortages?

Why doesn't the Government just make it rain to fill up the reservoirs?

I read on page 190 of Strange Stories: Amazing Facts (a Readers' Digest book) underseeding the rainclouds, that there is evidence to suggest that the science exists to engineer rainclouds.

It states: "Rainfall is caused by ice particles combining in clouds until they are heavy enough to fall."

In 1946 Vincent J Shaefer, a leading cloud physicist, began experimenting with "cloud seeding", that is creating rainclouds using chemicals put into the air.

His efforts generated a light snowfall. An American project named "Whitetop" later claimed it created rainfall increases of 600 per cent, and an Iraeli experiment was said to have increased rainfall by ten per cent a year.

So, Mr Tony Blair, why not make it rain? I'm sure George W Bush can help you.

-Paul Triballi, Brighton