By Andre Rhoden-Paul
BBC News
The inventors of a bubble pump designed to drawback plastics earlier they scope the water are among the 15 finalists successful the moving to triumph a £1m biology grant founded by the Prince of Wales.
The Earthshot Prize is fixed to innovative ideas for the environment.
Five winners volition beryllium announced successful Boston adjacent period - each volition beryllium fixed £1m to make their projects.
Prince William unveiled the shortlist, saying determination are "many reasons to beryllium optimistic" astir the planet's future.
He described the radical successful the shortlist for the prize - present successful its 2nd twelvemonth - arsenic "innovators, leaders and visionaries".
Prince William said: "They are directing their time, energy, and endowment towards bold solutions with the powerfulness to not lone lick our planet's top biology challenges, but to make healthier, much prosperous, and much sustainable communities for generations to come."
The Great Bubble Barrier, from the Netherlands, sees aerial pumped done a perforated conduit to make a curtain of bubbles, which brings integrative up to the aboveground and into a discarded postulation system.
For the archetypal clip determination are besides finalists from the UK, including London start-up Notpla Hard Material, which makes packaging from seaweed and plants arsenic an alternate to single-use plastic.
The institution has already created a cardinal biodegradable nutrient boxes for online nutrient ordering steadfast Just East.
Low Carbon Materials, from County Durham, uses unrecyclable integrative discarded to marque factual blocks without c emissions.
"Until now, operation has been 1 of the hardest industries to decarbonise," said Dr Natasha Boulding, co-founder of LCM.
"With LCM, that could each change. We've turned factual net-zero and present we request the satellite to commencement utilizing it."
Other finalists see the City of Amsterdam Circular Economy group, which wants to spot thing wasted and everything recycled successful the Netherland's superior by 2050.
Mikuru Clean Stoves, from Kenya, provides cleaner burning stoves to trim unhealthy indoor contamination and a safer mode to cook.
Charlot Magayi, who utilized to merchantability charcoal for fuel, started the inaugural aft suffering repeated respiratory infections owed to charcoal and her girl was severely burnt by a stove.
Her eco-stoves usage processed biomass made from charcoal, wood and sweetener cane, and claims they origin 90% little contamination than an unfastened fire. She hopes to make an adjacent cleaner mentation which burns ethanol.
Also nominated are Fleather, a leather made of floral discarded successful India; Hutan which creates wildlife corridors for orangutans successful Malaysia; Oman-based 44.01 who destruct CO2 by mineralising it successful rock, and the Indigenous Women of the Great Barrier Reef radical from Australia who usage a premix of past cognition and integer technologies successful their efforts to support the onshore and sea.
Prince William, accompanied by the Princess of Wales, is acceptable to conscionable the finalists and winners astatine the awards gala connected 2 December.
The Earthshot Prize volition spot £50m handed retired implicit 10 years.
There are 5 categories: support and reconstruct nature, cleanable our air, revive our oceans, physique a waste-free world, and hole our climate.
Last year's winners included a task successful Costa Rica paying section citizens to reconstruct earthy ecosystems and an India-developed portable instrumentality that turns cultivation discarded into fertiliser.