Self-government. Our representatives will either respond to a demand or, knowing that the request is ignoring the law, ignore the request. In either case, it is better to understand the law and the system. At least you should not spin your wheels inciting others to chase the wrong lead. In this case, such treaties are the source of nearly ALL environmental laws. In addition to that minor influence on your life, perhaps you might also realize that the UN is the source of the curriculum for your kids in school, "harmonized" rules of commerce (ever tried to export a product?), you pay a UN tax on airline tickets...
It ALL arises from treaties. Perhaps then it might be worth your valuable time to learn how it works. Other than that, I can't think of a reason for you to bother.