BBC: Scientists are more certain than ever that greenhouse gases from human activities are heating the planet, the head of the UN's climate panel says.
Rajendra Pachauri made the comments in an interview with BBC News.
The panel is due to deliver its latest report on the state of the climate later this week in Stockholm, Sweden.
Its last report was criticised after an error on glaciers unveiled other flaws, but Prof Pachauri said procedures had been reformed and strengthened.
He also dismissed...