Green Mountain Energy Company | 12,376 followers on LinkedIn. We’re on a mission to protect our planet with 100% clean energy, carbon offsets and sustainable living solutions. | As the nation’s longest-serving renewable energy retailer, we’ve been on a mission to change the way power is made since 1997. By choosing our 100% clean, renewable wind and solar energy plans for their homes and businesses, our customers have avoided more than 98.9 billion pounds of CO2 emissions to date — that’s like taking 10.4 million cars off the road for an entire year! But we’re more than just an energy company.