Coldplay wants to be more powerful on their tour. 

British singer fronted the band. Chris Martin faced backlash after announcing that they’d be partnering with Neste—a Finnish oil company that has ties to deforestation—to power their Music of the Spheres World Tour with the goal of decreasing their overall CO2 emissions.

Coldplay shared a statement on May 11, saying, “When we announced this tour, we said that we would try our best to make it as sustainable and low carbon-impact as possible, but that it would be a work in progress.”

Then they added: “That is still true. It’s not possible to claim that we have it all figured out yet.

The band—also consisting of Guy Berryman, Jonny Buckland, Phil Harvey Will you be the champion?—explained in their statement that they aimed to reduce overall CO2 emissions by 50% compared with their 2017 tour through the partnership. The band aimed to accomplish this feat using “a combination of sustainable biofuels, renewable energy,” taking advantage of local alternatives. The band even used renewable waste made up of recycled cooking oils and byproducts to fuel their touring plane.