India, April 19 -- O ver the past 50 years, more than half of Peru's glaciers have melted. Rainfall in the Andes has shown significant variability, with sharp declines predicted. A 2019 World Bank report placed the national capital, Lima, at severe risk of drought by 2030. But change, on a small scale, has begun here. In 2014, the country decided to zoom out and find a powerful way to drive change. A series of new laws now make it mandatory for all utility companies managing the country's water supply to invest 3% to 5% of the money paid by citizens as water bills in nature-based solutions (NBS) such as watershed conservation (a coordinated approach that focuses on land, aquifers and vegetation). In cities such as Moyobamba, this has helped...