Organic tomato farmers know that cover crops are key for ensuring adequate nitrogen supply in the soil each year. But not all covers are equal.

New York City's urban agriculture has not been found to provide benefits to either hungry people or the environment. How could city farms work better?

A hundred years later, we are still learning.

Organic agriculture seems like it would be better for the environment than conventional. But a new study suggests it produces more carbon dioxide.

Livestock emit greenhouse gases. They also can sequester carbon and boost biodiversity.