Are you talking about a company/concept or about the environment? Because there are no disadvantages of a clean environment...If you pollute your water sources and the air you are left with sickness, a lack of clean drinking water, and an increased instance of asthma and other breathing problems.
It is very important today to understand the results of environmental pollution. Today people work with cleaning companies or just harmful cleaning products in their homes and do not think about the nature and planet. That is why it is necessary to start from your home and the methods you make it clean. If the cleaning means, just organic ones, if the cleaning companies, the ones working only does. As there are so many ways to prevent the ecology problem just in such a way!
I try to use only ecology friendly items and to struggle with my friends and relatives on harm ones usage, as well.