Google, Amazon, Apple and Microsoft have come together in this brief to offer our unique view as large consumers of energy. Collectively we used 10 million MWh of electricity last year, including at 50 data centers in 12 states. That means reliable and affordable electricity is integral to the continued growth and operation of all of our businesses and the services we offer to our users everywhere. We are all committed to sourcing our power in a sustainable way, and renewable energy makes good business sense for us all.
At Google, we have been carbon neutral since 2007. We have signed contracts to purchase over 2GW of renewable energy -- equivalent to taking nearly one million cars off the road -- making us the largest non-utility renewable energy purchaser in the world. Just last year we signed the largest and most diverse purchase of renewable energy made by a non-utility company to power our data centers. The deal covers a series of new wind and solar projects around the world and takes us one step closer to our goal of powering 100% of our operations with clean energy. Above and beyond our own power purchases, we have also invested more than $2.5 billion in 22 other renewable projects around the world.
These efforts underline the seriousness of our commitment to renewables and we believe the CPP is an important step in the transition to a cleaner energy future. The message from our companies today is clear -- we can meet the world’s future energy challenges in a way that drives innovation and growth while tackling climate change.