Lawyer Afroz Shah, who spearheaded the beach clean-up project at Versova to become a UN Champion of the Earth in 2016, has been focusing on the Mithi river since November 2018. In an interview with the Indian Express, he sayid the biggest challenge to clean the 17.8 km-long (11 miles) river, which runs through the city, is to train a large number of people living along its banks to keep it clean.