Alitalia has become the latest airline to sign a letter of intent with US bioenergy firm Solena to examine the possibility of building a plant that converts household waste into aviation biofuel.
I haven't managed to secure many details yet, but what I did get from a Solena Italia spokeswoman can be found in this initial story.
I'm planning to try and interview Solena's chief executive for a possible feature story later on, so stay tuned.
British Airways signed a similar deal with Solena last year, under which it agreed to purchase all of the biofuel produced by a proposed Solena plant in east London to use on part of its fleet from 2014.
Qantas Airways is also reported to have entered a similar agreement with Solena.