Help Fix Global Warming With Pollution?

I know it sounds funny, but scientists are actually working on this.

The Dutch climatologist, awarded a 1995 Nobel in chemistry for his work uncovering the threat to Earth's atmospheric ozone layer, suggested that balloons bearing heavy guns be used to carry sulfates high aloft and fire them into the stratosphere.

While carbon dioxide keeps heat from escaping Earth, substances such as sulfur dioxide, a common air pollutant, reflect solar radiation, helping cool the planet.

Tom Wigley, a senior U.S. government climatologist, followed Crutzen's article with a paper of his own on Oct. 20 in the leading U.S. journal Science. Like Crutzen, Wigley cited the precedent of the huge volcanic eruption of Mount Pinatubo in the Philippines in 1991.

Pinatubo shot so much sulfurous debris into the stratosphere that it is believed it cooled the Earth by .9 degrees for about a year.

Maybe it's not funny.