Singapore, An Indian solar-powered tech venture that is combating food waste in the country and a global soil carbon marketplace founded by an Indian-American are among this year’s five winners of the prestigious Earthshot Prize, founded by Britain’s Prince William and dubbed the ‘Eco Oscars’, announced here on Tuesday. S4S Technologies, founded in 2013 by seven university friends Nidhi Pant, Vaibhav Tidke, Swapnil Kokte, Ganesh Bhere, Shital Somani, Tushar Gaware and Ashwin Pawade, won the award in the “Earthshot Prize to Build a Waste-Free World” category, while Boomitra, founded in 2017 by Aadith Moorthy, won the award in the “Fix our climate” category.