Math students at Indus High School are solving linear equations and graphing ordered pairs of points on a life-sized Cartesian plane. The grid is composed of nearly 10,000 poplar trees, planted in ...

Policymakers and automakers are debating the slope of a single line on a chart that will shape India’s fuel economy norms from 2027 onwards. At stake: the future of small cars, SUVs, and trucks.