Those who believe people caused global warming naïve, says president's spokesman

President Vaclav Klaus's spokesman Petr Hajek has hit out at an event on Thursday evening in which lights in several European capitals were turned out for five minutes as a protest against the wasting of energy and global warming, the iDnes website reported. Mr Hajek told reporters the event was ridiculous, saying that people who believed the warnings of scientists about global warming were naïve. President Klaus has himself questioned whether human civilisation is responsible for global warming.