Marketing isn't only for selling products. You can't also market social change. In fact, I think companies should to do some advertising that improves society. It's just a good idea. They have to do this kind of advertising because it's not required by law. However, they ought use their money and knowledge to help people in general. Why? Well, we, as customers, not have to buy their products. I think we shouldn't only buy products from companies that are socially responsible. Because we care about the world, we must to pay attention to how we spend our money.