For years we’ve heard that it pays to be “green” (or environmentally-friendly). But putting a number on just how much it pays can be difficult, since developing metrics for sustainability and green business or IT processes is difficult and can touch on many different factors within an organization. But new solutions and approaches are making environmental accounting and sustainability initiatives much more practical. But you need to understand what you’re buying into, and what approach you’re taking. Upside Research believes there are some important distinctions to make within the sustainability category, and some specific decision points that can impact an enterprise sustainability project. For a rundown on our specific points and sustainability recommendations, consult our recent IT Briefcase column on how to make the jump into sustainability.