badly written article. Nitrogen fertilizer runoff is a valid concern in water bodies but has nothing to do with greenhouse gas. IE missisippi dead zone.
It is but the article isn't referring that at all. It refers to "nitrogen emissions" several times and ends by specifically citing that "Nitrous oxide plays a major role in destroying the ozone layer..."
The article is not badly written. It says exactly what it intends to say and what the Denmark government is trying to do. The farmers of Denmark know it is folly too ...
The national farmers' federation said reducing nitrogen emissions was a mission impossible. "The consequences would be extremely costly and require a huge workforce," according to the federation's head Martin Merrild.
Nitrogen comes from decomposing plants and animal waste. The more fertile areas have always put more nitrogen into rivers in those areas. The same conditions have always existed, where muddy deltas run into oceans.
But more recently, a few academic twits are noticing and trying to meddle against food production in the more fertile plain regions. They should keep their noses on their commie/foreign side of the desert and shut up.