0x16d3e35a…837bsent to0xcb04fbb4…28af2018-04-02·#5,369,776·view on Etherscan {"text":"*total mass* Coal mass mined: 7.9bt; Al (2017): $1/lb; C: $0.04/lb; Cu: $3/lb; Au: $19,500/lb; Fe: $40/lb"}