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World's Hardest Problems
- entropicgravity 4y agoIs your water pure? You had better hope not.
- hulitu 4y agoThinking before writing is hard: "Can we create biodegradable material for our everyday products ?" Yes we can. Ask people who wants to buy a biodegradable washing machine.
- mikewarot 4y ago>Is the food we eat scalable, sustainable, healthy, nutritious and tasty? What energy and fertilizer inputs does it depend upon? It used to be that farming produced more calories than it consumed, thanks to solar input. With the advent of industrialized farming, topsoil loss has resulted in large swaths of land that can no longer be farmed without constant fertilizer, water and fuel (for machinery) inputs.