Do you have any links (in English) about this? I am having a bit of trouble finding anything really substantive. I have an unfinished environmental studies degree, so I find this interesting.
Not sure what you define as substantive but this is what I know about:
There's a documentary about the topic called, The Power of Community - How Cuba Survived Peak Oil. You can watch at the link below.
https://www.youtube.com/watch?v=UUWces5TkCA
another dense source: http://www-pub.iaea.org/mtcd/publications/pdf/pub1328_web.pd...
google: "cuba sustainability" no quotes for a bunch of stuff.
I had a rather lengthy medical crisis, so I was out of the loop for a long time (and it is essentially the reason my degree was not completed). It is currently resolving and I am trying to get more back in the loop on things.