Our objective is to assess the environmental issue based on the percentages of the main biophysical and ecological phenomena in question released by the group of French researchers. Among the main environmental problems are particularly climate change, air pollution, scarcity of water, deforestation, pollution of water, waste management, biodiversity loss, population growth, population movements, deterioration of soil ecosystem-equilibrium, chemical Pollution, Urbanization, thinning of the ozone layer, energy, consumption, new diseases, degradation of natural resources etc...
The study we noted that climate change is at the top of the main environmental problems of a percentage of 51%, the scarcity of fresh water by 29%, deforestation 28%, biodiversity loss 23% , waste management 20%, urban 23% and decrease in ozone 15%...
And last comes the increased sea level Therefore one might conclude that climate change is closely correlated with urban policies in industrial energy and transportation.
In a context dominated by the struggle against the emission of greenhouse gases, problems of air quality should not be underestimated and policies relating to climate protection must be taken into account.