Few small notes: - personally I think agriculture is one of the few (semi)industrial sectors who can really run on solar: we do not need tractors, we use them

Few small notes: - personally I think agriculture is one of the few (semi)industrial sectors who can really run on solar: we do not need tractors, we use them just because we have invented them as a replacement for animals used for similar "traction" works, nowadays we can lay out rails (like we have for certain irrigation bot on scale) [1] with enough self-orienting solar panels on top to power slow motors and slow pumps to slowly traverse a field for irrigation, fertilization etc. It's already a bit doable a step at a time; - we can't use only natural fertilizers (manure, ammonia from urine etc) just because we are too many, but a less giant population can. For instance Canada, Russia probably can live well enough with only natural fertilizers; - nuclear, fission since it's the sole operational on scale we have, go well enough with industry since modern industry have almost constant loads and NPP easily produce constant energy, surely they are not really renewable BUT so far they are the lest polluting and more effective mid/long term solution usable on scale, with enough heat and electricity we can't replace mineral coal for steel production, we can't fly airplanes [2] but we can reduce much their demand so buy 50-10 year of time to develop something else; - about consuming less: I've built a new house, with good insulation, VMC, p.v. etc so now I consume much less and live better than before, BUT to build it I've used many resources and the same apply to us all. It's easy to say "we can consume less" when to reach that goal we need to consume much more... It's not much different for food: if I buy a bit of land and build a kind of plant for poultry, trouts, a bit of crops, freezers, oxygenation systems for the water, auto-cleaning and recycling systems for poultry rooms to make fertilizers etc I'll not be self-sufficient in food but can probably produce enough to survive in a no such bad manner. Unfortunately that demand a gazillion or resources just to nourish a small family for a not that big timeslice (plant do not last more than few decades and nothing makes possible rebuild them with local resources). That's to say: we are a society, we are interconnected, we can't progress alone, we can't survive without a certain critical mass of humans working together spread around the planet. That's the hyper-big issue. [1] https://www.ers.usda.gov/media/9165/june17_datafeature_schaible_photo.jpg https://www.ers.usda.gov/media/9165/june17_datafeature_schai... or simpler https://media.istockphoto.com/photos/wheel-line-irrigation-system-picture-id152149646 https://media.istockphoto.com/photos/wheel-line-irrigation-s... [2] yes, few nuclear airplanes have been experimented with limited success in the '70s but they were left in the oblivion since they are just too dangerous and barely capable of fly themselves without any load.