CLIMATE scientists from around the world have thrown aside their professional
caution and admitted that humans are to blame for global warming. Their
conclusions send a tough message to politicians who have reached a deadlock in
negotiations on how to combat soaring temperatures and sea levels.
This week, scientists met in Shanghai, China, to fine-tune the latest
assessment from the UN’s Intergovernmental Panel on Climate Change (IPCC). In
their final text for policy makers, they toughened their language, saying “most
of the warming is attributable to human activities”. Drafts circulated last
October said simply that human activities “have contributed…
