Saúl Luciano LLiuya, a farmer from the Andes, is suing the German energy giant RWE for its emissions of climate-damaging CO2. This case could set a precedent for the fossil fuel industry. After all, there are many fates like that of Saúl and his neighbors all over the world. If he wins, the ruling could pave the way for a flood of lawsuits from poor countries that have barely contributed to the climate crisis but are feeling its full force.