Making natural gas emissions-free will be a challenge

On a gravel road in La Porte, an industrial city to the south-east of Houston, a series of billboards tells an inspiring story. “Burn natural gas” says the first, “Generate electricity” the second. After that comes “Capture all emissions” and, finally, “Change the world”. The outwardly unremarkable industrial facility at the end of this display of Burma-Shave Americana has big ambitions. Its owners see it as a step towards making natural gas a permanent part of zero-emission electric grids around the world.