Last week journalists revealed that Merkel and Sarkozy are planning to water down EU legislation tackling CO2 emissions from cars. That's why we launched a petition on Friday, calling on other top European politicians to resist. The petition has been signed by almost 16,000 people at time of writing.

Jocelyn from Australia posted news of our cars petition on, early this morning, and now it's the top environmental story. It's clearly an international issue.

Many people look to Germany for leadership on tackling greenhouse gas emissions. Angela Merkel gets climate change, but the chemistry between Germany's government and the German luxury car industry is clouding her judgement.