<p>To avoid dangerous climate change and limit global warming to below 3.6 degrees Fahrenheit above the level of preindustrial times – a target endorsed by the international community and the United States – global greenhouse gas emissions need to be reduced by 80 to 90 percent by the second half of this century. But even eliminating all carbon dioxide emissions from the energy and transportation sectors may not be enough to reach that target because greenhouse gases from food and agriculture, mainly nitrous oxide from agricultural soils and methane from livestock, will be too large.</p>
