An international team of environmental scientists has found evidence that climate efficiency involving farming has been leveling off in recent years. For their study published in the Proceedings of the National Academy of Sciences, the group studied a half-century’s worth of data to estimate greenhouse gas emissions per unit of protein from farming. An international team of environmental scientists has found evidence that climate efficiency involving farming has been leveling off in recent years. For their study published in the Proceedings of the National Academy of Sciences, the group studied a half-century’s worth of data to estimate greenhouse gas emissions per unit of protein from farming. Ecology Agriculture Phys.org – latest science and technology news stories