https://theenergyst.com/what-is-net-zero-why-energy-efficiency-is-ke/ Sat, 26 Nov 2022 15:05:00 +0000 hourly 1 https://wordpress.org/?v=6.5.3 https://theenergyst.com/what-is-net-zero-why-energy-efficiency-is-ke/#comment-26436 Sat, 26 Nov 2022 15:05:00 +0000 https://theenergyst.com/?p=18477#comment-26436 “Net zero” is about stopping the net emission of fossil carbon dioxide (CO2) into the atmosphere. It is not about reducing or stopping the net emissions of non-fossil CO2, because non-fossil CO2 emissions are part of the short term cycle of atmospheric CO2 having first been removed from the atmosphere by plants in growing, of which many will be consumed by animals (including humans) in growing with their final waste products breaking down into biomethane which is released back into the air to be a powerful greenhouse gas for around 9 years, until broken down by sunlight into CO2 to complete the cycle.
Some fossil CO2 is release in the manufacture of cement when limestone (calcium carbonate) is first roasted. This fossil CO2 needs to be captured and stored with a carbon capture and storage process (CCUS) to offset this release of fossil CO2 from cement manufacture.

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