The leachate conveys an important pollution load essentially formed of heavy metals, organic matter, and important community of pathogenic bacteria: by leaching and infiltration through the ground, it begets an organic, bacterilogical, and heavy metal pollution of soil ,surface water, and ground water(phreatic zone).

        The organic fraction's biodegradation  of Municipal solid waste beget biogas emissions which cause the atmospheric pollution by contributing to the green house effect and global warming, particularly the Methane and hydrogen that are highly flammable ,and if they are not collected and valorised in a renewable energy form, they will be led to a potential risk of fire or explosion.