Faced with ever-increasing population and ever-decreasing food systems, five scientists discuss the challenges and potential solutions that could feed the people and protect nature. The fourth installment of The New York Academy of Sciences' and The Nature Conservancy's four-part series Discourses on Nature and Society.

There's a new energy across the United States about recapturing nature in cities, but can these efforts rebuild biodiversity? Leading scientists, authors, and urban conservationists discuss the science behind and promise for today’s urban conservation efforts. The third installment of The New York Academy of Sciences' and The Nature Conservancy's four-part series Discourses on Nature and Society.

How can we build a new U.S. conservation and environmental movement to meet the challenges of the new century...or is the desire to mainstream environmentalism just a symptom of the problem? The second installment of The New York Academy of Sciences' and The Nature Conservancy's four-part series Discourses on Nature and Society.

How can Earth possibly meet its growing energy demands without destroying the environment? Experts on wind, nuclear, hydropower and other energy forms debate the most promising paths forward. The first installment of our four-part series Discourses on Nature and Society.