Why do people say the earth will get drier if global warming is manmade?

A warmer earth means greater evaporation, meridional widening of the subtropical highs due intensification of atmospheric circulation and in many areas greater influence of continental tropical air masses.

You said it, people say that as they come up with outlandish reasons for AGW without scientific proof. People are not scientists. Man also exhales C02 and by the way C02 is not a pollutant, nor is it a major greenhouse gas, like water vapor is. In fact C02 has little to no effect on the global temperatures, however it is an essential element of the atmosphere and without it Al Gore could no longer spew his nonsense, money making scheme to the gullible.

Historically this is usually true. There are cases like the famous Mt. Kilimanjaro featured by gore in his slide show where removal of forests to gain more croplands for farming dried out the air decreasing the humidity reaching the mountain causing the glacier there to recede. so everything needs to be studied to determine the actual cause of an event not just applying a universal political solution as the warmers do.

Because saying that areas that are dry will get wetter does not offer up "scary scenarios". It was generally acknowledged that when the first civilization that flourished in Mesopotamia the earth was warmer and wetter.

"The climate for the region ranged from seasons of cool to hot seasons with temperatures often over 110 degrees Fahrenheit. Mesopotamia experienced moderate rainfall."

"The land of Mesopotamia was once dominated by floods, but today is mostly desert....The land that was once marshes and channels that provided food, protection, and life to the people there, no longer exists"

http://www.shrewsbury-ma.gov/schools/Central/Curri...

What some one thinks is garbage . What I fear will happen . Global Warming is a lie .

The global whiners are going to say whatever it takes to get you into their cult.