Harvard is vowing to kick its fossil fuel habit by 2050. As a first step, the university will aim to become carbon-neutral by 2026.

Harvard says it can reach its ambitious goal by reducing energy use on campus and then investing in off-campus sources of renewable energy such as wind and solar.

Harvard President Drew Faust admits it’ll be challenging, but, in a statement to the campus community, she cites “the grave risks climate change poses to our health and our planet’s future.”

Harvard’s announcement comes as students and environmental activists are pressuring colleges to switch to renewable energy.

Last semester, Hampshire College in Amherst, Mass., became 100 percent solar, generating all the electricity it uses right on campus. Hampshire pledged to be carbon neutral by 2022.