Greenpeace activists tried to stop Apple's coal consumption at its source by blocking train tracks that Duke Energy uses to ship coal to Apple's Maiden, North Carolina data center. Activists targeted the Marshall Steam Station in Catawba county, according to a report in Charlotte's WCNC.

Protestors locked themselves to the train tracks, posted a sign that read "Save Our Mountain Clean The Cloud" and branded train cars with Apple's logo. Greenpeace International IT analyst Casey Harrell said, "Apple should be more transparent about its coal problem, and take steps to start solving it, as other tech companies have."

Police were called in to disband the protest and remove the signs. The protesters will be charged with trespassing.

This article was originally published on Tuaw.