In many cases the reduction of these emissions leads to economically viable projects, not only protecting the environment but also improving the plant performance, projects for optimalisation of absorbers and in the waste water treatment section are of this category. Projects to reduce dust and/or ammonia emissions from a prill tower or a granulation are merely environmental projects and cannot be justified in a direct economic calculation. These investments however will certainly please the plant neighbours. 

The re-use of purified waste water can be economically viable, whereby the profitability of a purification project depends to a large extend on the availability of raw water and the costs of BFW in the fertilizer complex.