360 Yale: Ecuador’s Yasuni National Park is one of the most biodiverse places on Earth and is home to remote Indian tribes. It also sits atop a billion barrels of oil. Now, Ecuador and the United Nations are forging an ambitious plan to walk away from drilling in the park in exchange for payments from the international community. Hunched in the back of a pickup truck speeding down an oil road near the western border of Ecuador’s Yasuni National Park, Juan Carlos Acacho — a short, wiry Shuar …