If I'm not in an environment where I can record, it's great to be able to write something down, to be able to know how to do that, to be able to write notation. You grab a piece of paper and there it is. It's the cheapest recording equipment you can buy: a piece of manuscript paper and a pencil!
On the environmental front there's concern about global warming and high levels of carbon dioxide, and trees take in CO2 and store carbon.