I have long been a satisfied user of Amazon, both as a reader and self-published writer.
However, Amazon does not only sell books and other things. They are also a provider of server and cloud storage space via Amazon Web Services.
Operating servers and datacentres, particularly on as massive a scale as Amazon does, also requires a lot of power. Amazon has committed itself to powering these datacentres via renewable energy with a longterm goal of 100% renewable energy.