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Message: <blockquote data-quote="Mad as Fish" data-source="post: 69834" data-attributes="member: 396">Unfortunately the world is full of idiots like you who pronounce on agriculture, and the worlds food supply  in general without a single clue as to what they are on about, but that doesn't stop them lecturing to one and all.The climate change nutters have been doing nothing but focus on CO2, but when it doesn't suit the narrative then suddenly everyone else is at fault for doing so!I'll try and make this easy for you. Carbon is the building block of life, we are a carbon based life form, all life on earth is, so there is a carbon cycle.That carbon cycle has photosynthesis on one side and respiration on the other. Basically, plants take carbon from the air and use sunlight to build sugar, starch, protein etc while animals eat those products, extract the energy and expire carbon back as CO2.The greater the CO2 concentration the quicker and bigger plants can grow, and that includes crop plants. But here's a thing, plants have holes in their leaves called stomata. These holes open and close to ventilate the cells with CO2 within, unfortunately, when they do so they let out moisture so a plant will close them when it gets too dry.The good news is that with a higher CO2 concentration the stomata don't have to stay open for so long and so the plant is less prone to drought stress, meaning it can grow in drier conditions, which is why the world is getting greener.The overall result is all plants, including crop plants, will grow bigger and quicker resulting in higher yields, and they need less water to do so. It's a win win situation!Another key to higher yielding crops is a healthy soil and simply throwing NPK at it is not going to help us much in the long term. But understanding how the soil works is a huge subject, the complexity and importance of which we are only just beginning to grasp. A bit of extra CO2 here and there pales into insignificance when compared to this aspect.</blockquote>

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