INTRODUCTION I undertake this course because I am very interested in the environment, in recent years following various innovations and the change in public interest on the topic. I think nature is an important subject of great relevance. So I decided to attend the environmental marketing management course, in a critical way towards everything I was learning and studying. This started from my personal idea that every writing or article we read is not objective, but subjective. Fortunately during this period of study, I had the opportunity to study Environmental Marketing Management and my Public Economics exam and to find out how the topic is related to the topic of negative externalities. I'm studying right now the different types of government (in this case US) controls on pollution, with the goal of regulating the economy and protecting the environment. The author's idea (Joseph E. Stiglitz, former president of President Clinton's Council of Economic Advisers) is radically different from those heard in class. I prefer to have different documentation and gain new knowledge. Fines, tradable permits, regulation and innovation are different ways for a government to control pollution which constitutes a negative externality in the way that, if by producing we create goods useful to people, we also create pollution which is an expensive problem to solve. The author follows the same points discussed in class. Fines and marketable permits are not the best solution. In both cases, companies could be pushed to maximize their profits to pay fines or to purchase tradable permits from less polluting companies (depending on the level of fine); the same also applies to grants. Performance-based regulations and input regulations are introduced as one of the best ways to control the pollution created by the market. Performance-based regulation can create some injustice in the market, as for example drawn from the regulation of scrubbers in the American coal industry, where the imposition of pollution limits led some producers in the western United States not to use scrubbers at due to the different geological characteristics of the resources, with bad competition for the eastern producer. In this way, performance-based regulation makes a difference between geographic areas; while it would be better if all producers were encouraged to reduce pollution. This type of solution has often been driven more by politics than politics. Different problems for the national economy could also be given by innovation policy.