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GHG-wise sustainability of our daily caffeine-dose

Depending on your location, you can grow your own caffeine! Camellia sinensis sitka is a hardy variety of the common tea plant. It does well to Zone 8, or even colder, if you can put it in a protected ...
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What's the effect of space launches on climate?

I think this is negligible. Space shuttle uses 0.6 million kilograms of liquid oxygen and 0.1 million kilograms of liquid hydrogen per each trip. So it's not even using fuels that would emit carbon. ...
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