Should municipalities disclose their carbon footprints? According to the Carbon Disclosure Project (CDP), such reporting is a no-brainer. CDP has already become the global carbon disclosure platform for multinationals and large corporations: 3000 of them reported their climate change related information in 2010, including 80% of the largest 500 companies in the world. That information in turn is sliced and diced by investors, stakeholders, and governments. Now CDP is focused on cities.

As Michael Meehan explained last week, sustainability has moved out of the token CSR office, into the C-suite and in the halls of the finance department. Water efficiency and carbon emissions tracking have also found their way on the balance sheets, as companies want to demonstrate to their shareholders that they are reducing costs and mitigating risks.

PwC has reduced its greenhouse gas emissions this year by 20% from its 2007 levels. That reduction is impressive when one considers that PwC had worked to achieve that goal by 2012. It’s no surprise-the firm has focused on sustainability for 15 years.