T-Mobile US announced a commitment to cover 100% of its energy usage by 2021 with renewable electricity. The company has joined RE100, a global initiative uniting businesses committed to 100% renewable electricity.

“It’s the Un-carrier way to do the right thing by our customers, and moving to renewable energy is just a natural part of that,” said John Legere, president and CEO at T-Mobile. “And it’s not just the right thing to do – it’s smart business! We expect to cut T-Mobile’s energy costs by around $100 million in the next 15 years thanks to this move. Imagine the awesome things we can do for our customers with that!”