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Weighing just 260 kg each, they will fly in very-low-Earth orbit at heights of roughly 550 km, which means that atmospheric drag will pull them down within a few years so they don’t end up as yet more space junk. Powered by ultra-low-carbon biofuel, it will have 86% fewer emissions than a fossil-fuel rocket.
Globally, the rate of reforestation is catching up to a slowing rate of deforestation. [11] 32] Part of the reason the planet is greening stems from greater carbon dioxide in the atmosphere, and greater planetary warming. [33] Central America, South America, Africa, and Oceania are still deforesting. million to 3.3 Chen et al.,
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