Tidal lagoons could generate 8% of the UK's electricity, writes Stephen Tindale, and go on doing so for 120 years to come. With the Hinkley C nuclear project looking ever more dicey, and with promises to shut down coal fired generation by 2025, a promised new tidal lagoon In Swansea Bay would come in very useful. So why hasn't the government included it in the Energy Bill?
An new design of tidal power turbines will generate power at a third the price of current technologies, write Alex Kirby & Oliver Tickell, even at a lower price than offshore wind - without endangering marine life.
The UK may have turned its back on the Severn barrage but across the channel they have been harnessing tidal energy from the River Rance for more than 40 years - and it may yet point to a way forward for smaller-scale renewable projects
Inconsistent wind is no impediment to the generation of electricity by turbines, three separate reports have concluded, as well as showing that the National Grid is more than able to cope with increased investment in wind energy
The Severn Estuary, earmarked as a potentially huge source of energy, has been met with increasing concerns over serious environmental damage. A report from 2008 by Frontier Economics found that justification for the Severn Barrage is slim - both economically speaking and on environmental grounds. Peter Bunyard takes a look at an innovative solution that has similarities with a tidal reef.
The pesticide industry knows all too well that nature quickly develops immunity to its chemical armoury. But a new study by scientists at the Instituto Gulbenkian de Ciencia (IGC) and the Faculty of Science of the University of Lisbon, in Portugal has shown that a species of worm can develop resistance to a common pesticide in just 20 generations, or 80 days.
The Government's Sustainable Development Commission (SDC) has given the nod to a huge barrage across the Severn estuary which will result in the loss of 145 hectares of protected wetland habitat and a change in the intertidal area of some 14,428 hectares.