What shouldn't be done...about climate change in General Chatter Posted Tuesday at 02:01 PM 18 minutes ago, Wolfgang I said: Without fertilizers which require large plants for their production feeding the worlds population would be impossible. That has nothing to do with making food out of thin air. Unless that is what you call the Haber–Bosch process and you need natural gas for that too. That does not even consider things like soil degradation. I take it you have heard about photosynthesis. Looks like author of the article that was posted upthread hasn't. As for the Haber-Bosch process, you don't need natural gas for that. That's just the cheapest way to produce the hydrogen. And it could be disputed that we really need it in the quantities we use right now as a large chunk of it is for meat production.