Newsletter Does the moon hold the key to the Earth’s energy needs? Tidal power is the only renewable source derived from the moon. Now an extraordinary array of devices promise to unlock this vital energy potential.
Politics The Guardian view on tidal energy: Cost is not the whole story Ministers' decision to shelve a pioneering wave power scheme in Swansea Bay is based on evidence - but also ideology.
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals
A controversial facility that would process plastic waste to be burned in steel mills has been cancelled
