Renewable Energy, Energy, Mining, Science, Technology.
How to read this chart: to obtain 1 lbs of pure gold, for example, one would need to mine, lift and crush somewhere between 1⁰⁵ (100 000) lbs and 1⁰⁸ (100 000 000) lbs of rocks. And while silicon, iron or aluminum takes just 10 lbs per 1 lbs, it is not possible to build high tech electronics