Regarding climate change, in your July 8 edition John Kastner wrote about the "global cooperation desperately needed to stabilize the planetary temperature." Would someone please inform Mr. Kastner that the Earth's climate has never been static?

Warming and cooling cycles were the norm long before humankind. And like it or not, we're not going to significantly affect the natural course of climate change. Speaking of which, since the Earth has actually cooled since 1998 in what some scientists predict could be a prelude to a mini-ice age, I do share his apparent concern about global cooling.

KEVIN WILLIAMS, ROCHESTER

(Williams is director of meteorology at WHEC and is president of Weather-Track Inc.)