As climate change, we understand a change of climate attributed directly or indirectly to a human activity that changes the composition of the global atmosphere and that is added to the climate natural variability observed during comparable periods of time.

This is the definition established by: FRAMEWORK CONVENTION OF THE UNITED NATIONS ABOUT CLIMATE CHANGE. ARTICLE 1. DEFINITIONS 1992

Scientific studies of the IPCC have concluded that the current climate change has got an anthropogenic origin; this means that it is caused, mainly, by human activity. Fossil fuel consumption for the production of energy (charcoal, oil, petrol, diesel, natural gas and oil-based fuels) along with the forests lost by fire, are two of the main causes of the problem.

Intergovernmental Panel on Climate Change (IPCC), whose activity is a direct mandate of the United Nations, is formed by scientists of all over the world that investigate and establish the international scientist consensus around the phenomenon of climate change. This panel unites scientific, technologic and economically relevant information in order to understand the risk of the climate change, the potential impact and the options of adaptation and mitigation.

The consequences of climate change are very diverse and of high complexity. Approximately, we can say that the international scientific community warns us that as time goes on, we will have more extreme climate and a more intense climate phenomenon. In general, summers will be warmer and the raining patterns will be modified, creating more intense rains in some territories and the opposite reaction on others, with an increase of the droughts on the latter ones. Another feared consequence of the climate change is that the layers of permanent ice, which are on the coldest places on earth, will start melting gradually with the consistent increase of the average level of the sea, which will lead to the permanent flooding of the wide seaside areas on the planet.