The decontamination of th ground depends on adequate ambient rules, that will be able to vary of a region for another one, depending on its ambient problem.
It also depends, of the personal awareness of each one, contributing with cares special their proper trash, an attitude of bracket to the campaigns in charge agencies, of monitoration the one that is made with the trashes of its house and the industries...etc.
What if you can make:
Collection of the trashes: any that is its origin, must be collected and be placed in places that make it difficult population's contact .
As the nature of the trashes, to recycle what it will be possible: metals, glass, plastics,...
In the case of the trash, must be deposited inadjusted place, to prevent the chorume, rich liquid in nutrients and toxic ande pathogenic substances - resultant of the splitting of the debris. The adjusted forms of deposition more are: sanitary landed, incineration and plant of compostage.