A strategy to unleash the green energy potential of vacant space in towns and cities should begin—and not end—with car parks.
, 430 km² of solar would supply the same amount of power each year in gigawatt-hours as those ten nuclear plants.. So it’s possible, though car parks will make up a tiny portion of the overall program.The UK and countries further north receive less sunlight per m² and the sun sits lower on their horizon, which makes the issue of shading on panels bigger, although the longer days in summer do compensate for this to some extent.
Also, while a lot of car parks in southern Europe already have sun shades over them , this is rare in cooler countries. As a result, it would probably be a lot easier to mount panels on the roofs of buildings than over the surrounding car park in some countries. Where solar panels aren’t practical, other options, like wind turbines, might well be viable alternatives.
Likewise, some car parks, especially those in city centers, are shaded for most of the day by tall buildings nearby. But there is no reason not to put panels on top of them instead.
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