The organization you're referencing is called La Via Campesina. It is an international organization of peasant and small-scale farmers and fisher folks from across the world. Many of the organizations are, in their home countries, engaged in food sovereignty issues and work against deforestation, which is, of course, a prime driver of emissions in a lot of developing countries.
In a lot of cases where some of these smaller organizations are engaged, the emissions issues are less from agriculture in a lot of countries than they are from energy production. It doesn't tend to be a primary focus of those organizations. However, some of our sister organizations in the EU, for example, are actively engaged in emissions reduction practices and education, just as we are here.