The article explores how different agricultural support policies affect global greenhouse gas emissions from farming. By using a global model scenario, the researchers found that removing subsidies to farmers would decrease emissions from certain activities, while removing trade protection would increase emissions. Policies that directly reduce emission intensities have a bigger impact on lowering emissions compared to increasing overall productivity. The challenge lies in designing policies that reduce emissions without compromising other goals like improving nutrition and reducing poverty. The study sets the groundwork for understanding how changes in agricultural support can help mitigate greenhouse gas emissions and adapt to climate change.