, underscore the need for strong climate policies that do not focus solely on carbon dioxide, the dominant greenhouse gas.2O) emissions caused by human activities have increased by 30 percent since 1980. Those emissions, more than two-thirds of which come from agriculture, account for nearly half of all nitrous oxide released over the past decade, with the rest coming from natural ecosystems.   Nitrous oxide is also the largest contributor to atmospheric ozone depletion that is not controlled by the Montreal Protocol, an international agreement developed in the 1980s to phase out...…, underscore the need for strong climate policies that do not focus solely on carbon dioxide, the dominant greenhouse gas.2O) emissions caused by human activities have increased by 30 percent since 1980. Those emissions, more than two-thirds of which come from agriculture, account for nearly half of all nitrous oxide released over the past decade, with the rest coming from natural ecosystems.   Nitrous oxide is also the largest contributor to atmospheric ozone depletion that is not controlled by the Montreal Protocol, an international agreement developed in the 1980s to phase out...WW…