Quick: Think of a company that’s a sustainability leader. A real visionary when it comes to protecting the environment. OK, stop. I bet Microsoft didn’t come to mind. Perhaps surprisingly, the company is taking real steps toward becoming a “green tech” leader, thanks in large part to efforts by the company’s senior director of environmental sustainability, TJ DiCaprio. In 2012 DiCaprio led the charge to launch an internal carbon fee that puts a price on carbon emissions from data centers, software development labs, offices and air travel. Funds raised through this fee are used to support renewable energy and carbon offset projects throughout the company. Ensia reached out to DiCaprio to learn more about Microsoft’s efforts to address climate change through carbon reduction.