In case you weren’t aware, global warming has become the major issue of our times, and Senator Al Gore its most ardent campaigner. But so says the site Gore’s next big target is not carbon emissions, but laughter. Apparently, when people laugh they release more CO2 than usual into the atmosphere.

Theoretically the Simpsons could be causing more environmental harm than gas guzzlers and bovine emissions combined. Conserve energy all you like but remember - every time a syndicated Seinfeld re-runs another yard of polar ice cap dissolves.

So, Al wants to stop the humour and save the planet. And he isn’t the only one. Some concerned Actors have set up HaHa - Hollywood Against Humorous America. Their mantra; Laughing is a crime against the environment.

And as anyone who's watched Will Ferrell and Ben Stiller's latest flicks will know, they seem to winning the the war on humour.