Since climate changes have caused significant problems in the functioning of the modern world, human society and economics at the global level, it is inevitable to take appropriate protective measures. Climate change and its bad influence directly relate to the environment and indirectly to economic, i.e. tourist activities which are linked to natural potentials. For years, human or industrial activities have been emitting greenhouse gases into atmosphere, which have harmed the climate to a large extent. In order to prevent further pollution, permits for emitting greenhouse gases were introduced at various conferences on a global level. These permits are traded on the stock exchange so this paper gives an overview and description of CO2 emission trading. Such an indirect environmental protection provides the possibility of reducing harmful gasses emission into atmosphere, and thus less harming climate factors. The paper puts emphasis on the Kyoto Protocol, CO2 emissions market, situation and tendencies on the market and their influence on tourism.