World leaders arriving in Paris this week for U.N. Climate Summit were greeted with hundreds of spoof billboards mocking what activists see as the undue influence that corporate interests hold over the talks.

The UK-based guerrilla artwork group Brandalism took credit for taking over more than 600 advertising spaces on bus stops and street corners around the city and placing satirical ads nearly identical to those of the companies they skewer.

Here is a twitter stream of them:

#brandalism Tweets

Source: Hundreds of fake ads totally skewer corporate sponsors of Paris climate talks