Farming and industry are producing too much of a substance we ought to be concerned about, says Mark Sutton; not carbon, but nitrogen. And he would like to hear your ideas on what society should do about it.
Over the last decade, you have surely heard many views as to why you should worry about carbon and climate change.
But the chances are you're not worrying about nitrogen.
In fact, there is a global nitrogen threat out there, yet the world seems not to notice!
It's an issue that has recently been highlighted by two reviews in the journal Science.
In many regions of the world, humans are producing too much nitrogen, creating a host of different environmental threats.
Most of this nitrogen is made for a reason - we need it to fertilise crops and feed ourselves. Without it, it has been estimated that around half of the world's population would not be alive.
Put these parts of the problem together and you get what we might call the "NitroNet" - a complex web of nitrogen interactions that are difficult to explain and even harder for governments to manage.
And here you can already see why people on the streets are not yet talking about nitrogen.