Nuclear power plants are not much of an improvement over conventional coal-burning power plants despite claims that nuclear is the 'clean air energy.' Uranium mining, milling, leeching, plant construction and decommissioning all produce substantial amounts of greenhouse gases. Taking into account the carbon-equivalent emissions associated with the entire nuclear life cycle, not just the nuclear fission itself, nuclear plants contribute significantly to climate change and will contribute even more as stockpiles of high grade uranium are depleted1.  Nuclear waste can remain radioactive for thousands of years. It must be stored for all this time away from water into which it can dissolve and far from any tectonic activity. This is virtually impossible and there are serious concerns over the state of waste discarded even a few decades ago. A report by the Environment Agency attacked Britain's disposal system as many containers used to store the waste are made of second-rate materials, are handled carelessly, and are liable to corrode; computer models suggest up to 40% of them could be at risk of being compromised within as little as 200 years2. Tens of thousands of containers of this waste, bound in concrete, are simply being stored above ground, mainly at Sellafield, while the Government and the nuclear industry decide what to do with them. On present plans it is assumed they will remain there for up to another 150 years before being placed in a repository underground, and then another 50 years before it is sealed3. This problem would only be added to if more nuclear power stations were built.  1The case against nuclear power". Greenpeace. January 8, 2008 2 Geoffrey Lean, 'Nuclear waste containers likely to fail, warns "devastating" report', The Independent, 24th Aug., 2008, 3 Geoffrey Lean, 'Nuclear waste containers likely to fail, warns "devastating" report', The Independent, 24th Aug., 2008,