In the rice-growing heartland of eastern Madagascar, Razafindrainy Ernest was facing a crisis. Despite years of back-breaking work, his harvests were failing. He was struggling to meet the basic needs of his family. “I did everything I could, but I could never harvest more than 10 bags of rice each season,” he said. “It was discouraging, especially when you have a family to feed.” In Madagascar, where rice is eaten three times a day and makes up more than half of most families' calories, 10 bags a season could leave a family hungry for most of the year. The country is one of the world’s most climate vulnerable. The United Nations has warned it could be the site of the planet’s first climate change-cased famine. Devastating droughts, punctuated by intense cyclones, have made farming incredibly challenging. Farmers face a dangerous cycle: Climate change threatens their crops and livelihoods, prompting them to expand their farms by cutting down trees.…