and now the race is on to try to solve that as adrian murray has been finding out.wers can be reused, the massive blades are almost indestructible. and, as older models are replaced, many get dumped in landfill. by 2050, there could be 43 million tons of redundant blades globally that need to be dealt with. it is problematic, because we want the renewable energy to be truly sustainable, and if you have a waste material that goes to [and filling, it's not truly sustainable. it's a problem players have been scrambling to figure out. now turbine makers have had a breakthrough. siemens gamesa manufactures some of the world's biggest blades at its site here. and while this one looks like any other, it can be recycled. it all comes down to a resin called epoxy, which acts like a really strong superglue, binding together the fibreglass. usually, this is incredibly tough to break down — but not here. we change something in the backbone of the chemistry. this has actually gone through our recycling process. we just turn it around. here, you can see all the different glass ha