Reuters: The world may need a new U.N. pact to compensate victims of climate change or risk a tangle of billion-dollar lawsuits linked to heatwaves, droughts and rising seas, a study said on Wednesday. The report, commissioned by the WWF UK environmental group, said the world already had compensation deals for accidents from nuclear power, oil spills, or even objects launched into space. But there were no U.N. schemes for damage from climate change. “The likelihood of legal action …