1sockchuck writes: This week's Slashdot poll shows a strong preference for renewable energy to power data centers, with solar energy leading the pack. But until recently, only a few colocation providers have actually sourced renewable energy to support their facilities. A sign of progress is the commitment by Equinix, the world's largest colo provider, to shift to 100 percent renewable energy for the more than 100 data centers it operates across the world. The company is seeking to accomplish this through power purchase agreements and buying green power from utilities that offer it. Equinix is also testing both on-site solar arrays and fuel cells from Bloom Energy, which is slowly gaining traction in data centers. Although hyperscale cloud companies are sourcing more green energy, the Natural Resources Defense Council has targeted the multi-tenant data center sector as a source for huge potential gains in renewables.