As the world’s population surges, the international community faces a pressing problem: How will it feed everybody?

Until recently, people thought India had an answer.

Farmers in the state of Punjab abandoned traditional farming methods in the 1960s and 1970s as part of the national program called the “Green Revolution,” backed by advisers from the U.S. and other countries.

Indian farmers started growing crops the American way — with chemicals, high-yield seeds and irrigation.

Since then, India has gone from importing grain like a beggar, to often exporting it.

But studies show the Green Revolution is heading for collapse….