Time to sell Microsoft shares?: "starting on July 1, Microsoft will start to tax itself. For every ton of carbon dioxide that the main global offices and data centers produce, they will pay a tax that will be used to buy carbon dioxide certificates, which will make Microsoft carbon neutral"

Governments May Not Be Key Players In Rio+20 Talks | Climate Central

For example, starting on July 1, Microsoft will start to tax itself. For every ton of carbon dioxide that the main global offices and data centers produce, they will pay a tax that will be used to buy carbon dioxide certificates, which will make Microsoft carbon neutral. As Microsoft's climate chief Rob Bernard, says: "While governments have an important role to play, we hope that there is an advantage to moving faster than them."

By the way, note the planet-killing bottled water on display at the UN Conference on Sustainable Development: