Which of these statements is true about coal? *
1 point
People thought existing reserves might run out soon, but we are able to extract more
by hydraulic fracturing (fracking) shale deposits
It is obtained by drilling into layers of rock that contain it, then pumping it out
While it does not produce air pollution when used as a fuel, it does leave behind solid
radioactive waste
It is a sedimentary rock formed from the compressed remains of land plants and is
burned as a fuel