[magicalist]

> instead of shutting down agriculture in the only marginal spot on the west coast you can grow food.

Not an expert, but I would think greenhouse light pollution is not necessary for agriculture? It seems like obvious waste (money spent generating light that isn't going to photosynthesis), but I assume it's cheaper not to shield the lights than to shield them, so it's a matter of ROI and requiring people take care of their externalities.

Is there an economic argument that light shields will make agriculture in that area too expensive?

[bpodgursky]

I mean it's not easy to have greenhouse walls that let sunlight in but don't let grow light out. You can direct the light but you are going to have loss.

[rrr_oh_man]

Yeah, let's not inconvenience companies.

(FYI, it's a solved problem: https://de.made-in-china.com/co_zenong/product_Agriculture-P...)

[wizzwizz4]

Sunlight and grow light generally happen at different times.