Waiting for scientists to be specific

Although Mr. Foster states in his article on climate change that glaciers and ice sheets have been photographed for decades melting away, he makes no mention of the earth being in the final stages of the last Ice Age which has taken thousands of years. Rather he says that "there is also little scientific doubt that global warming is being caused in large part by human activities." In doing so he reaffirms the major flaw of science in that they never define what is a "large part".

Fact is, scientists never say how much is caused by humankind versus mother nature. When they come up with a reasonable percentage we can take them seriously.

You at the Daily Herald may take this upon yourselves to do the research and see when and who has ever stated what the ratio is and then let us all know.

W. Brand Bobosky

Naperville