See how six countries are faring amid efforts to protect 30 percent of the planet’s land and waters by 2030, and what will be saved if they succeed. 

Policymakers face complex cost-benefit considerations when intervening in the market to mitigate perceived risks, from climate change to competition with China.

Each Friday, I look at what the presidential contenders are saying about foreign policy. This Week: Donald Trump gave his most detailed interview on foreign policy yet. He made some dubious claims bu…

The alliance with Japan has been the cornerstone of U.S. security policy in East Asia for decades. Now, Japan’s role in global security is growing as challenges from China and North Korea mount.  …

The sprawling U.S. water system is central to the nation’s economy, but chronic underinvestment, increasing demand, and the consequences of climate change have revealed the system’s weaknesses.  

U.S. aid is critical not just for Ukraine, but for U.S. credibility in Russia and beyond.

Each Friday, I look at what the presidential contenders are saying about foreign policy. This Week: Donald Trump has long criticized U.S. foreign policy. That doesn’t mean he wants America to “come h…