'Greenfield' as in the programmer terminology. Essentially a new location, untouched virgin land. Sorry to mix terminologies, that would have been ambiguous. N

'Greenfield' as in the programmer terminology. Essentially a new location, untouched virgin land. Sorry to mix terminologies, that would have been ambiguous. Nitrogen pollution is from the nitrogen that blows and runs off of farms. It is a staggering amount: "globally farmers apply around 115 million tonnes of nitrogen to our crops every year. Only around 35% of this is used by them, meaning 75 million tonnes of nitrogen runs off into our rivers, lakes and natural environments. This is our “excess nitrogen”. It is quite staggering that almost two-thirds of our applied nitrogen becomes an environmental pollutant." [1] I talked to a compost expert recently. He claimed if the nitrogen were fermented first to be bio available, it would require less and no longer be a pollutant. There are solutions, but until then farmers just accept that one third of nitrogen applied actually makes it into the farm soil [1] https://ourworldindata.org/excess-fertilizer https://ourworldindata.org/excess-fertilizer