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Three engineers leading the field in clean energy solutions come together for a special event presented by Kevin Fong at the Victoria and Albert Museum, London.

You can't go out today and buy perovskite solar cells, but we're building a production line at the moment. we're talking about next year, the first cells and modules will be in production and start to be deployed in the world. so this is all fantastic, this is state—of—the—art technology and engineering that is market ready or nearly market ready. so is the message that i should get that you are going to gallop to my rescue when it comes to climate change? that i can carry on with my life as i always have, and everything is going to be fine, because the engineers are going to sort it all...

Solutions that are good for the individual, but the biggest challenge ahead of us isn't technology, it's public acceptance. it's support for improved permitting and collaboration on changes to ensure that migration patterns for birds are known and we don't site wind turbines in those areas or wind farms in that space. but there can'tjust be a wholesale rejection of this technology because of the threat of something that would be negative. that collaboration is the real opportunity for us to work together. so it's a partnership, really, it's you delivering the technologies that make the future ...

Is a tandem cell, two solar cells on top of each other. and the perovskite we can tune to match perfectly silicon. it absorbs only the visible light and we let the silicon absorb all the infrared. and in doing that we actually fundamentally improve the efficiencies. if we made a perfect perovskite on silicon tandem cell, that would top out at about 45%, so we've fundamentally lifted the ceiling. and if we went one step further to anotherjunction, triple junction, three junctions, that would top out at just above 50%. so what perovskite does is lift the ceiling for potential efficiency and give...

Out in the world, it'd be 24% reduction in cost. and as you continue to see volume increase in these technologies you will continue to see cost reduction. thank you so much, danielle. so we are now going to go to scotland, to alastair, who has a question about nuclear energy. alastair? hello, today we've got representatives of wind and solar, which are often portrayed as the two examples of clean energy. but there are still huge challenges with the amount of land required and energy storage required — challenges which aren't faced by existing nuclear power technology, something i would argue...