Singer Robert Del Naja, aka 3D, tells the BBC he came up with the idea to reduce the band's carbon emissions after accepting past tours had contributed to climate change.
The decision came after Massive Attack donated four years of their tour data to a University of Manchester report into the music industry's carbon footprint.
"We have enjoyed a high-carbon lifestyle but, as a society, we've all existed in a fossil-fuel economy for a long time and had very little choice in that," he explains. "The challenge now is to not only make personal sacrifices, but to insist on the systemic change that's needed. Business as usual is over."