Nuclear energy goes against Green World  In order not to harm environment, not to cause climate changes, renewable power plants (wind, water, solar) should be used. However, these do not work together with nuclear power plants. Nuclear plants – giant very hot machines – are designed to operate at full speed (85%) all the time. They are not designed to change the output quickly. Since they are very expensive to build, they are not economic unless operated at full speed (also turning off and on is expensive). Solar and wind power plants are not stable (output varies because of natural factors) and thus need a backup, called a baseload. Nuclear plants are not a good backup for renewables. We need nimble plants in order to support wind and solar plants. Nuclear power stations do not work with solar, wind and water power stations, because they are running at full speed all the time (because of economic and technical reasons). Instead gas plants that can be powered up and down as required are needed to balance power generation. If we want to move towards Green World – nuclear energy does not help us to do so. [1]  It is generally agreed that we want more renewable power generation in Europe even if there are disagreements about where plants should be situated or how much must come from renewable sources. The European Union aims to have 20% of energy from renewable sources by 2020. [2] And if it is to meet CO2 reduction targets far more will be needed in following decades.  Nuclear is also not as helpful as renewables in meeting these CO2 reduction targets. It is estimated that renewables produce 10-40g of CO2 pre kWh of electricity produced, but nuclear is currently much higher at 90-140g/kWh, though still only a tenth of coal. And as mining becomes more difficult it is estimated that this could double making nuclear no better for reducing CO2 than gas power. [3]  [1] Nelder, Chris, ‘Why baseload power is doomed’, smartplanet, 28 March 2012,   [2] European Commission, ‘Directive Of The European Parliament And Of The Council Amending Directive 98/70/EC relating to the quality of petrol and diesel fuels and amending Directive 2009/28/EC on the promotion of the use of energy from renewable sources’, Europa.eu, 17 October 2012,   [3] ‘CO2 emission of electricity from nuclear power stations’, Time for change, May 2012,