Well, if he insists

Already switched to Deezer and liking it way more

It could also be that they no longer used their channel but were hacked. I’ve seen a handful of larger youtubers have their channels get hacked, rebranded to something completely different, then explain what happened when they get it back. With smaller inactive channels, its unlikely that they’ll be changed back.

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Some materials have higher carbon emissions than others, in terms of refinement, processing, and transportation. The third point is location dependant, but creating and shaping different materials will have different contributions to global warming.

Edit: There are also concerns with the product’s end of lifespan. How long it takes to biodegrades, how easily recyclable it is, and how much the available disposal methods will effect the environment. Plastic is not great on several of these accounts. Recycling plastic water bottles isn’t very efficient either, compared to glass bottles for instance.

Textbooks are pretty nice to learn things on your own or as a supplement to classes. If you can find free ones online or at a library, definitely worth it. Full price, not so much.

Edit: I know this post is about economics textbooks though, so I can’t speak on those. However, I do think textbooks in general are a great resource that tends to get underappreciated.