Worldwide, plants emit about 100 million tons of monoterpenes into the atmosphere each year. These volatile organic molecules include many fragrances such as the molecule pinene—known for its pine fresh scent. Since these molecules are highly reactive and can form tiny aerosol particles that can grow into nuclei for clouds droplets. Natural emissions play an important role in our climate. Therefore, it is important for climate predictions to know how monoterpene emissions will change as temperatures rise.