"As drought grips cities like Monterrey, people queue with buckets for brackish water. But Coca-Cola and other firms are still extracting groundwater".

"Adam Wraight pulled a blue sewage "warning" sign out of the sand near Imperial Beach Pier on Thursday morning, replacing it with the more ominous yellow and red placard telling beachgoers that waters were officially closed."

"The nation added a right to water to its constitution a decade ago, but has never created the policies that would ensure it’s met, leaving twice as many people thirsty today."

"In the coldest months of the year, thick fog blankets the mountain village of Coatitila in eastern Mexico, hiding the bulging, pine-covered hills that cradle it. At midday, the sun pulls back the fog to expose patches of blight where trees have been axed for logging or farm work."

"Beside a canal that runs through farmland, rushing water roared through an irrigation gate and flowed down a concrete culvert toward a wetland fringed with cottonwoods and willows."

"Not all scientists agree with the findings, which seem likely to fuel an ongoing debate about the threats the butterflies face."