Hi - it's me again :)
You might want to take a look at @cleanplanet, @plantpoweronhive and @diyhub if you did not yet.
@cleanplanet speaks for itself when it comes to sustainability.
@plantpoweronhive supports everything about vegan and vegetarian food. The foodprint of vegan food is only a fraction compared to eating meat.
@diyhub can also include sustainable content I think.

Best regards,
Pundito