By Gita Bhatt

In Ernest Hemingway’s novel The Sun Also Rises, a character is asked how he went bankrupt. “Two ways,” he answers. “Gradually, then suddenly.”

It’s the same with climate change. The damage is becoming less and less gradual, and unless we take action, the world could suddenly reach an irreversible tipping point.

We now know the problem is much worse than we once thought. It requires not incremental change, but radical overhaul—roughly halving carbon emissions each decade through 2050. Getting there demands that we rapidly shift to renewables, build new electricity networks, increase energy efficiency, and embrace low-carbon transport. Cheaper renewable […]