Protesters disrupted a U.S. side event on the future importance of fossil fuels at the COP24 conference in Katowice, Poland, on Monday. Separately, U.S. negotiators are helping to write a rule book that will help countries reduce greenhouse gas emissions.

Protesters disrupted a U.S. side event on the future importance of fossil fuels at the COP24 conference in Katowice, Poland, on Monday. Separately, U.S. negotiators are helping to write a rule book that will help countries reduce greenhouse gas emissions.