In western Germany, a case against energy company RWE could set a worldwide precedent for corporate responsibility and climate damages. What exactly is at stake?

LIMA, Peru — A landmark climate lawsuit opens in a German court Monday, as a Peruvian farmer sues a German energy giant over the threat to his home from a mountain lake overflowing with glacier meltwater.

A German court on Monday resumes hearing a landmark case brought by a Peruvian farmer who argues that the German energy giant RWE's emissions have contributed to the melting of Andean glaciers, increasing the flood risk to his home.