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Originally Posted by RustyLugNut
NOx dissolves in precipitation (mist and rain) as nitric acid. What mechanism transforms this nitric acid into fertilizer?
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Reaction with soil chemicals to produce nitrates. It's basically the same way in which NOx created by lightning is converted to nitrates. And unless you happen to be a legume hosting a bunch of nitrogen-fixing bacteria, that's where the nitrogen needed for growth ultimately comes from. (Yes, that's over-simplified, 'cause a lot of the available nitrogen gets recycled in animal droppings &c.)
As for ocean acidification, that's almost entirely caused by increased atmospheric CO2, which dissolves in seawater to produce carbonic acid:
Ocean acidification - Wikipedia, the free encyclopedia