Prince William launches prize to solve Earth's top environmental challenges

Britain's Prince William launched a multi-million pound prize on Tuesday to encourage the world's greatest problem-solvers to find answers to Earth's biggest environmental problems, saying the planet was now at a tipping point.The Earthshot Prize, described in its publicity as the "most prestigious environmental prize in history", will be awarded to five winners a year over the next decade with the aim of producing at least 50 solutions to the world's most pressing challenges."The earth is at a