Electric motorbikes hum through the woods outside Copenhagen while an ice sculpture of a polar bear melts forlornly in the heart of the city and artists pile up twisted garbage on the street ... all in the name of climate change. Only powerful decision-makers have a seat at the table in the Bella Centre and take part in COP15 negotiations at the international summit to set targets and new rules on curbing climate change. For ordinary people, participation is limited to the streets, where artists and marketers make creative leaps and fantastic claims in a bid to become part of the debate. In Nytorv square, enterprising filmmakers set up a golden trailer emblazoned with the words 'Brad Pitt is Saving Planet Earth in Copenhagen' in red letters. Inside the trailer, Christian Lollike is inviting passers-by to pull on a blonde wig, pretend to be Pitt and act in his short films. 'Artists reflect what is on people's minds,' says Lollike, who writes a short film for every day of the conference, each starring Brad Pitt wannabes. 'There is a lot of money out there for art like this, although I don't think that's good for art, to have funding be topic-specific like this,' he says. 'But our work here really makes fun of all this, using the themes and the names of the big actors in a trashy sort of way.' Few think such stunts have any impact on public thinking or policy. 'All the hullabaloo around the conference is pretty shallow,' says Vesteinn Valgardsson, a tourist from Iceland. 'It doesn't come close to grasping the real problem. All the marketing and showmanship is really just masturbation of the whole climate change debate. It helps people feel good without really doing anything themselves.' Nevertheless, Valgardsson says the street activities are a 'cool' way to feel a part of the conference. The WWF's polar bear ice sculpture melts a little more each day to reveal a grotesque bronze skeleton, but even the organisers wonder if people understand the message behind the installation. 'People will always jump on a bandwagon like this and I don't think there's anything wrong with that,' says Graham Lewis of London marketing consultancy Green. 'Will have it a real positive impact? Probably not. It's just some fun and fills a void on the sidelines of a very serious topic. COP15 is more about the government leaders, but it can still attract a sideshow.' Heightened interest in all things environmental creates an opportunity for the world's first international electric dirt bike race. Sanctioned by FIM, the international authority on motorbike racing, the race attracts world champions and Dakar Rally racers such as Pedro Bianchi Prata. It hardly feels like a motor-sport event without the noise and the smell of petrol-burning two-stroke engines, but the bikes whining their way around the track could be the way of the future, ays Ivan Reedtz-Thott, an organiser of the event.