The World Forum for Harmonization of Vehicle Regulations is a group of experts from all over the world who get together to talk about how to make sure car safety and emissions regulations are the same all over the world. Everyone wants cars to be safe so that when people drive, they won't get hurt. And everyone wants to make sure cars don't put bad stuff in the air that could make us sick. So this group of experts comes up with rules and regulations that all the countries have to follow. That way, all cars in the world will be safe and won't pollute the air.