Trump signs bill undoing Obama coal mining rule Ermanno Santilli Retweeted https://twitter.com/TheRealErmanno Blue Horseshoe ?@Blue_Horseshoe9 · 18h18 hours ago Trump signs bill undoing Obama coal mining rule http://thehill.com/policy/energy-environment/319938-trump-signs-bill-undoing-obama-coal-mining-rule … #Magnegas #Combustion $MNGA @TheRealErmanno @MagneGas