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Comment by toomuchtodo | Hacker News Reader

I would love to see the math of geothermal greenhouses powered by renewables versus the carbon footprint of air freight of food. As renewables drive down the cost of electricity, the economics continually shift towards local production versus import.

Outside of Alberta, most of Canada's electrical generation is very low carbon (nuclear and hydro) per electricitymap.org.

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ya, but I think a lot of commercial greenhouses are heated by natural gas because of lower cost. A quick google found some really interesting stuff regarding alternative (geothermal, biomass) heating specifically designed for greenhouses: https://www.greenhousecanada.com/topic/structures-equipment/...

Current state, yes! But something we need to get away from (unless methane from bioreactors or landfills is used, in which case burning it is the best form of disposal).

Check out Iceland.

https://usgreenchamber.com/how-iceland-is-revolutionizing-gr...

Slowly developing insulated indoor aquacultures, led lighting, robotic harvesting, perfect climate control, gas mixture, mineral and nutrients.

With near future robotics we'll see near zero carbon footprint production with near zero human work load for a fairly wide range of healthy foods.

This is very helpful, thank you for sharing!

NS, NB, NT, SK are all pretty dirty - https://energyrates.ca/the-main-electricity-sources-in-canad...

They only account for 10% of the national population though.

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