Pubs and restaurants will pump hundreds of thousands of tons of additional carbon dioxide into the atmosphere by installing outside patio heaters because of the smoking ban. It is estimated that heaters will be used for more than 237 days a year, which could produce as much greenhouse gases as a Jumbo jet flying 171 times around the world. Tony Juniper, of Friends of the Earth, wants the patio heaters banned. He says people should either give up smoking – or put an extra jumper on to keep warm. The Sunday Telegraph 02/12/07 page 9