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Biochar is an effective carbon sequestration technology.  I have used biochar at our Earth Day events for three years now (2017 - 2019) to make the events carbon negative (in terms of planning and running the events, plus the emissions from people attending them) by burying the char in the soil.  If trees are planted atop the char, then further carbon is sequestered.  Additionally, when the char is inoculated by microbes (to turn it in to biochar), it can be a beneficial soil amendment....

John Allen
by John Allen
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John Allen

John Allen

Pukekohe, New Zealand

Joined this community on Jul 10, 2019

Bio Undertaking sustainability projects for Anglican Diocese, Auckland, in the areas of food, waste, water and energy sustainability. Developed and teaches a "Grow Your Own Food" course. Initiated the Franklin Food Forest as a food sustainability project Have developed a household carbon footprint and budget tool. Argues that the climate change problem we face is a consequence of global warming which has other consequences that also need addressing (sea level rise, biodiversity loss, ocean acidification,...). Advocates that Nature does not need a "net-zero carbon future". It needs a gross-zero carbon future. Until society realises this, we will not solve the problem before us. Why? Because there is but one basic driver of global warming: we have upset the balance of nature's carbon cycle beyond nature's capacity to restore balance. The science is clear that increasing ghg concentrations in the atmosphere leads to the greenhouse effect and thus, global warming. There are two primary drivers that lead to that unbalance: one is our releasing greenhouse gases in to the atmosphere that are not already part of the short-term carbon cycle. Those gases are fossil CO2 and fossil CH4. They are released from the mining and burning of fossil fuels. The other primary driver is our removal of global carbon sinks - forests. Yes, there are other sinks, the oceans for example, but they are reaching saturation and cannot absorb much more fossil carbon. A low-carbon, reduced-carbon or net-zero carbon future still releases new-to-the-atmosphere fossil carbon and because our global deforestation has removed so much of nature's carbon sink, regenerating forests to achieve a net-zero impact is not solving the problem. We need to plant forests yes, but to remove excess carbon from the atmosphere, not to offset continuing emissions of fossil carbon.

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