The Web site JunkScience.com has raised its “prize” offering from $100,000 to $125,000 for anyone who can actually supply proof that human emissions of greenhouse gases are causing global warming. In presenting its Ultimate Global Warming Challenge, the Web site states: “If you think it’s a no-brainer that humans are causing catastrophic global warming, here’s your opportunity to earn an easy $125,000.” The challenge: “$125,000 will be awarded to the first person to prove, in a scientific manner, that humans are causing harmful global warming.”

The winning entry, the site notes, will reject this “hypothesis”:

“Man-made emissions of greenhouse gases do not discernibly, significantly and predictably cause increases in global surface and tropospheric temperatures along with associated stratospheric cooling.”

Entrants are told to limit their entries to 700 words — and include a $15 entry fee. The Web site defines Junk Science” as “faulty scientific data and analysis used to advance special and, often, hidden agendas.” As of this writing, the “prize” had gone unclaimed by anyone — including Al Gore — for more than 60 days.