As Climate Negotiators Debate Nations' Pledges, Scientists Worry It's Not Enough

Governments are wrapping up a meeting in Bonn, Germany, to figure out how to implement a global climate agreement. The conference has focused on the pledges to reduce greenhouse gas emissions, which nations made two years ago in Paris. But even as negotiators debate the details, scientists are warning that carbon dioxide levels are again on the rise, and the efforts in Paris may not be enough.