Reduce. It’s the first, and arguably the most important, of the “Three Rs” of environmental ethics: Reduce, Reuse and Recycle. And when it comes to greening datacenters — that is, lowering the environmental footprint inflicted by powering and maintaining IT assets within a datacenter — reducing the number of IT assets you purchase and maintain will certainly make the other two Rs, reusing and recycling, less of a burden. So how do you start? With virtualization software.