Jeffrey Sachs: China is unequivocally the world's climate power today. Asean's opportunity is next.

On September 20, 2017, Hurricane Maria tore through the small island of Puerto Rico, causing massive flooding and destroying thousands of homes. Nearly 6,000 people died in the storm. The power grid, which had been poorly maintained, collapsed. The blackout would become the longest in U.S. history. Prior to Maria’s battering, Puerto Rico’s solar industry did a modest business.That quickly changed.