California passes regulations that address pesticides. These regulations are much stricter on the use and production of pesticides than the federal regulations. Is this permissible under current law? What if California’s regulations are much less strict than the federal regulations?

California passes regulations that address pesticides. These regulations are much stricter on the use and production of pesticides than the federal regulations. Is this permissible under current law? What if California’s regulations are much less strict than the federal regulations?