1. Maybe you're right that's alarge part of it, (but fertilizers and better land management are surely another) they have nothing to do with fossil fuels and th

1. Maybe you're right that's alarge part of it, (but fertilizers and better land management are surely another) they have nothing to do with fossil fuels and there is no reason why they should be reversed when we stop using fossil fuels. 2. You're either made it up yourself or you're looking at made up grahps. Fertility rates dropped massively in almost all developing countries, most aren't having enough children to keep their populations stable. Most developing countries follow with some delay. 3. Nitrogen isn't a source of energy and neither it's a major energy cost for plants. Most plants don't even gather their own nitrogen, that's why they need nitrogen fertilizer. Plants that do don't need nitrogen fertilizer, because they can get as much as they need. There is absolutely no problem making fertilizer without fossil fuels. And nitrogen isn't used up, so only the losses have to be covered. 4. That's not what I said. Once a mineral is mined, it doesn't disappear until it's lost. Iron stays iron, copper stays copper, no matter how you use them. I said nothing about energy, recycling presumably needs less energy than mining most minerals anew. 5. a) No fertilizer is made from fossil fuels. 5. b) It has nothing to do with fossil fuels and it can't be compared with fossil fuels. When you burn a fossil fuel, it turns into exhaust gases and ash and it's no longer recoverable in any form as a fuel. But phosphorus stays phosphorus and potassium stays potassium. Only the losses need to be covered and at worst you will have to extract the lost minerals from the sea. But you can't ever run out of a mineral, unless you burn it in a nuclear reaction. 6. >Even highly abundant mineral resources such as iron and oxygen are available to us through previous biological activity on the planet. Look up "banded iron formations" and "the great oxygenation event" for background. Humans have plowed through a billion years of iron accumulation in a couple of centuries. These elements have always been present on Earth. These events didn't create iron reserves, on the contrary, they turned (immediatelly usable) elemental iron into oxidized iron ores that we need to turn back into their unoxidized form. 7. And don't make the mistake that fossil fuels store millions of years worth of energy, they don't. They did take millions of years to form, but they hold relatively little energy. ALL fossil fuels likely don't hold more than one week of sunlight. It's absolutely nothing. They were the first thing we happened to develop, but sunlight provides vastly higher amounts of energy. If we went the way of solar energy, energy would be so cheap by now it probably wouldn't even be metered.