I was wondering if there's any analysis on which source of caffeine is GHG-wise the most sustainable.
Coffee is often shipped around half the globe, while energy drinks usually come in a can, which - even if recycled - need a lot of energy in production. Black or green tea are another option, as well as maté, but also only grow in certain areas of the world. The latter also is available as (glass-)bottled soda, which might taste better, but requires more processing and hence produces more GHG.
So, how do I fuel my caffeine craving best when it comes to climate wise sustainability?
I am aware of the issues of virtual water and social sustainability/working conditions, but for the sake of simplicity would like to ignore them for this question.