While a number of our activities on this earth can pollute the atmosphere, especially in areas where population , commercial and industrial activities are intense, we do not control the global climate switch.    Even those scientists who support the management and control of climate by restrictive measures are still only neophytes when it comes to understanding the impact of that apparently infinite universe in which our small globe  moves.    Climate change  has been here before mankind arrived and will continue, regardless of what measures we take.    We can improve our environments on a local or regional basis, but we can't control the climate.