I'm not trying the hard sell on devices and methods to decrease your CO2e consequences and energy bills. If you've worked out that CO2e is worth sorting out then send an email to my mailto
Don't rely on my opinion and assertion that CO2e is important. It is better to get the source material from as wide a set of unbiased observers as possible. I used materials including:
Don't be put off that some of those are quite old now.