More recently, invoking the concept has been a tactic to criticize research on the harmful environmental or public health effects of corporate activities, and occasionally in response to such criticism. The term has been used by proponents of both sides of such political debates. Author Dan Agin in his book Junk Science harshly criticized those who deny the basic premise of global warming,[1] while former Fox News commentator Steven Milloy has extensively denounced research linking the fossil fuel industry to climate change, on his website junkscience.com.[2]