'Global dimming' is darkening the globe: experts Updated Sat. Jul. 29 2006 10:07 AM ET Andy Johnson, CTV.ca News Global dimming may be the yin to global warming's yang. The theory is that the amount of sunlight, or solar energy, falling on the earth has been dropping steadily over the past 50 years or so. That could mean, scientists believe, that global dimming is actually mitigating the effects of global warming. That sounds quirky and intriguing at first, but a closer investigation turns up some frightening results. One of the first people to observe the phenomenon was an English scientist...