While I ponder one of my great loves, intersection cohomology, and a cat meows in protest because I can only really think while pacing around, which prevents cuddling (apologies also to the neighbors living below me), I want to discuss, for a second, the issue of sustainability.

There are immediate things we can and have to do to preserve the planet, such as more sensible and sustainable encounters with our waste, our energy, or transport, with respect to what we eat and what and how much we buy. Most of what we buy and produce is not actually needed, and that includes the hyperloop (which is an interesting engineering project at best).

But these notions are obvious (well, they should be). Then why is it still getting pushback, why are changes slow?

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