As the planet heats up dangerously, businesses are facing mounting public pressure to use more renewable electricity to reduce their carbon footprint.
Companies can do so in a few ways. Small shops can install a few solar panels on their rooftops to keep the lights on. Some firms may be content to buy renewable energy credits.
But a growing number of corporations – the likes of Apple, Microsoft and Nike – want to enter long-term contracts directly with large-scale solar or wind farms, to secure a reliable supply of green…