A landmark climate change case begins at the world court. In its largest case in history, the International Court of Justice heard testimony from officials of several small island nations on how climate change is endangering their survival.

The International Court of Justice, the United Nations’ highest judicial body, is beginning landmark hearings on global warming. Here’s a guide.

The top United Nations court has taken up the largest case in its history, hearing the plight of several small island nations helpless in combating the devastating impact of climate change.