People are concerned by the implications of product consumption on their health, which is why they become followers of a healthy and sustainable lifestyle, using green products and becoming aware of a sustainable environment. To have a viable business and to respond to customers' needs, the organization must have an attractive product that offers utility, value, health, joy, and satisfaction to consumers. This chapter analyses a few approaches regarding the implementation of green marketing policies and the situation of green marketing in the world and in Romania. Green customers' behaviour in choosing a green product (using Markov chains), the impact this could have on the number of specialists and the surfaces used in ecological agriculture on green production (using a regression function) are also anaylsed, and the author developed some measures in order to improve companies' involvement in implementing green activities.