Facebook post by University of Helsinki

A panel proposes the introduction of voluntary nutrient emission compensation trade for reducing the eutrophication of the Baltic Sea. Under the scheme, for example, wastewater treatment plants could compensate for the nutrients remaining in the water they've purified by funding a reduction of nutrients elsewhere.
Compensation for nutrient emissions would boost the conservation of the Baltic Sea | University of Helsinki helsinki.fi

The local-level Baltic Sea panel proposes the introduction of voluntary nutrient emission compensation trade for reducing the eutrophication of the Baltic Sea. Under the scheme for example wastewater treatment plants could compensate for the nutrients remaining in the water they've purified by fundi...