A MAJOR international climate meeting opened today in Bangkok to discuss how the world can best take action now to avoid global warming. At least 400 scientists and experts from about 120 countries are attending the one-week, third session of the Intergovernmental Panel on Climate Change (IPCC), the UN's leading authority on global warming. The delegates will work to finalise a report on how the world can mitigate rising levels of carbon dioxide, methane and other heat-trapping gases.