As one of the more than 1,200 people arrested outside the White House during the recent tar sands action protesting plans to build a crude oil pipeline from Canada through the American heartland, I'm always amused by the Republican claim that climate change is just a theory, or worse, a hoax.

Unless we all get PhDs in climate science, we have to accept the opinion of experts in the field who overwhelmingly endorse global climate change as both a reality and as something influenced by human activity.

Does anyone doubt that if another scientific theory with exactly the same empirical support turned out to be good for corporate profits, these same round-earth deniers would be touting the theory as scientific truth?

The Republicans say they are pro-science, but what they really mean is that they are for science only so long as its conclusions are good for business.

Jerry T. Lawler, Baltimore