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vegetable + green matter decomposition
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<blockquote data-quote="Bogweevil" data-source="post: 7696234" data-attributes="member: 48190"><p>Your veggie expert will say plant with timber and use the timber for fuel to replace fossil fuels or in building, to replace concrete and bricks, where it will be locked up for decades until the building is replaced when the wood can be re-used or burnt for fuel. A timber tree takes just 50 years to grow in wetter, milder parts of Britain.</p><p></p><p>The thing about vegetation is that it takes CO2 from the air and fixes it for a while, so you are talking about an on-going reduction in CO2 as more is planted, we hope, than destroyed. A cow's gut manufactures methane from material that would otherwise rot to release the less potent greenhouse gas, CO2. If, and it is vey big if, we can curb CO2, we won't see much reduction in levels until after 2050, but curbing methane production will deliver faster results. Livestock are only one source of methane, both enteric in ruminants and more importantly from manure - oil and gas production and distribution and also waste disposal are very important sources globally. But unfortunately agriculture is heavily implicated in Britain - this is not going away and very uncertain times are ahead for graziers and people who like a nice lamb chop or a beef steak or a morsel of cheese. </p><p></p><p>When you harvest a field of Brussels sprouts a humungous amount of biomass is left behind, onions and carrots not so much. The biomass is incorporated into the soil where it rots releasing CO2 with some, a very tiny amount, fixed as longer term soil organic matter. It is unclear how more can be fixed in the soil. </p><p></p><p>Fruit sheds it leaves every autumn and these are shredded with any prunings, sprayed with urea to hasten rotting which kills disease spores, and are taken back in to the soil by worms etc. An orchard with grass alleyways soon develops a soil with a high organic matter over the 25 year life of the orchard and if the trees can be mulched with low nitrogen municipal compost the soil organic matter vastly increases. Fruit can be excellent against climate change, but you cannot live on cherries.</p></blockquote><p></p>
[QUOTE="Bogweevil, post: 7696234, member: 48190"] Your veggie expert will say plant with timber and use the timber for fuel to replace fossil fuels or in building, to replace concrete and bricks, where it will be locked up for decades until the building is replaced when the wood can be re-used or burnt for fuel. A timber tree takes just 50 years to grow in wetter, milder parts of Britain. The thing about vegetation is that it takes CO2 from the air and fixes it for a while, so you are talking about an on-going reduction in CO2 as more is planted, we hope, than destroyed. A cow's gut manufactures methane from material that would otherwise rot to release the less potent greenhouse gas, CO2. If, and it is vey big if, we can curb CO2, we won't see much reduction in levels until after 2050, but curbing methane production will deliver faster results. Livestock are only one source of methane, both enteric in ruminants and more importantly from manure - oil and gas production and distribution and also waste disposal are very important sources globally. But unfortunately agriculture is heavily implicated in Britain - this is not going away and very uncertain times are ahead for graziers and people who like a nice lamb chop or a beef steak or a morsel of cheese. When you harvest a field of Brussels sprouts a humungous amount of biomass is left behind, onions and carrots not so much. The biomass is incorporated into the soil where it rots releasing CO2 with some, a very tiny amount, fixed as longer term soil organic matter. It is unclear how more can be fixed in the soil. Fruit sheds it leaves every autumn and these are shredded with any prunings, sprayed with urea to hasten rotting which kills disease spores, and are taken back in to the soil by worms etc. An orchard with grass alleyways soon develops a soil with a high organic matter over the 25 year life of the orchard and if the trees can be mulched with low nitrogen municipal compost the soil organic matter vastly increases. Fruit can be excellent against climate change, but you cannot live on cherries. [/QUOTE]
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