SOME NOTIONS

During every age the human societies have often modified local ecosystems and/or maximum some microclimates, with activity connected to their survival, for example to cook of foods, inflaming the forests in order to acquire new agricultural territories, or the warming of the caves, and then of their houses, especially in the coal age. But now we arrived to a the point, in which anthropic activities reached a global volume, due to the rapid exponential increase of the population, which causes an always greater consumption of fossil energy, an intensive use of the soil, more and more rapid movements across the planet and other human activities of every type that consume ulterior non renewable energy.
These total, global changes represent sure a great conquest from the human point of view with a doubled probability of survival in the last fifty years, serious epidemics like the smallpox, the plague, the cholera and in particular way the infectious diseases of all the types are almost disappeared, even if it still remains very much to do to find cures for diseases as: malaria, AIDS, the denque and the internal infections, in particular way in the sub-tropical and tropical parts of the planet. But exists also the reverse of the medal that involves a worsening of the meteorological climatic, ecological, physical and socioeconomic conditions, in many regions of the planet.

We only remember the tsunami of the 26th December 2004, enormous catastrophe at all, also for the highest contribution human lives, in particular children and young people. It's necessary remember that the world-wide meteoclimatic system forms integrating part of many processes, which permit the development of life in all its multiple manifestations.
Weather and climate, compared with other physical manifestations of the planet like strong earthquakes and imposing volcanic eruptions, have had some decade ago a minor impact on the human health.
But from some year the process is completely inverted. Now time and the climate started to be the main factor responsible of adverse effects on human health, in particular in the third world countries where to the paucity of the harvests, add both devastating alluviums or, in other localities, long dryness which have a great impact on every product of the earth, which dies before its maturation.
Human activities are putting pressure on the entire general circulation of the atmosphere, in particular by the increase of greenhouse gases and consequent constant elevation of the medium temperature of the planet. The risks are therefore continuous increasing, even if fortunately some month ago was approved Protocol of Kyoto, which is hoped to be at least a deterrent for an ulterior worsening of the situation.
The climatic changes in course at the moment influence and will sure more and more influence the ecosystems and, naturally, the vegetables and animals species contained in it, in a first time modifying the process of natural evolution, as it has been able to develop itself in hundred of million years.
The increase of medium temperature of the globe, esteemed to be of 6-7 degrees in next the one hundred years, will sure produce a remarkable expansion of the tropical diseases towards north and south, from the regions where they are now endemic, invading territories that at the moment don't know them at all.
We can therefore assert that the impacts of the climatic changes on the human health are of three types. First they are the directed effects, caused mainly by extreme meteorological events, like alluviums, persistent typhoons, hurricanes, continuous tornado, long dryness or continuous rains, which last many days which happen statistically in greater measure in the last decade and which don't show at the moment the minimal turnabout at all.
Secondly exist health damages caused by the continuous increase of polluting in the atmosphere, in particular way carbon dioxide (CO2), methane (NH4), sulphur dioxide (SO2), chlorofluorocarbons and others, that in the long period take part to the strength of the climatic changes, also for their long persistence in the atmosphere.
And at last serious consequences for human health of traumatic, infectious, nutritional, psychological kind and more and more can be determined from the progressive physical weakening and psychological demoralization of the entire poor populations, specially the poorer and less developed ones, who don't even have means to face whichever type of calamity, sometimes also relatively not important in industrialized countries, forced moreover to exoduses sometimes of Biblical proportions.
We can conclude these few notions, taking in consideration the fact, by now from many points of view undoubtly, than human health it will be able to improve only by taking in consideration instruments useful to check the progressive deterioration of the climatic and environmental situation. Only in this way it will be able to fight, for example, against the increasing of heat-waves in subtropical and plain temperate zones of a huge part of the globe, which bring with them dead and a progressive increase the infectious epidemic diseases, following alluviums or meteorological excesses, or also the more and more elevated risk of marine coastal populations as a result of the increase of the sea level in the next decades.