The world needs carbon-in not carbon-out
If we stopped releasing carbon from the soil into the atmosphere and captured it instead then the serious problem of global warming could be solved. International soil scientist, Dr John Baker, says, in relation to soil, there’s more “carbon going out than coming in” and the world has reached a stage where the process must be reversed. When it is, there won’t be a problem with climate change. Dr Baker points out we recycle bottles and plastics but not carbon and the time to start recycling carbon is long overdue. “There’s more CO2 in the atmosphere and less in the soil than ever before,” he says. “While the first crucial step is to grow more plants, it’s even more important to ensure the carbon that existing plants absorb from the atmosphere through photosynthesis remains in the soil.” At the moment carbon is squandered. About 50 percent is lost when food is harvested but Dr Baker says that’s acceptable because it’s why we grow food in the first place. But as much carbon again remains as straw, stubble and roots after harvest and, if this is removed, burnt or incorporated, then most of it gets back into the atmosphere where it contributes to global warming. “Instead we must retain the crop residue after harvest and offer the carbon to the soil microbes. They decompose it and earthworms and other fauna take it into the soil which enriches it,” he says. “The future of mankind depends on harnessing the biology in the soil and making it work for us. The impact would be massive if the uneaten carbon that food crops gather globally was transferred into the soil and stayed there.” The good news is that the world doesn’t need to invent new technologies to make it happen. New Zealand already has […]