Delegates debate on greenhouse gas emissions.

BANGKOK, Thailand -- A major climate meeting opened Monday in the Thai capital with delegates debating how to rein in rising greenhouse gas emissions that could threaten hundreds of millions with hunger and disease in the coming decades. For the rest of the week, hundreds of scientist and diplomats attending the Intergovernmental Panel on Climate Change meeting will work to finalize a report detailing a range of technological options to mitigate rising levels of carbon dioxide, methane and other heat-trapping gases.