Voices are rising day after day to demand the reduction of the environmental pollution caused by these companies, whether by workers found on site - one of whom one told me about the segregation practiced there. He said some Western employees isolate themselves in well-protected areas while they distribute local workers in cantons that lack the lowest level of protection - or by some experts in this field such as the former engineer and director of environmental supervision Mr.Khalil Weld Ahmed Khlaifa who was sacked from his job as result of unveiling the tremendous risks that effect the Mauritanian environment.