What are the key indicators of global climate change, according to NASA? And what evidence should be pointed out to climate skeptics? How does global climate change reflect "negative externalities" and "Karl Polanyi's Paradox" (as defined in GPCC)? How do food exports from wealthy countries to poor countries hurt medium and small farmers in poor countries? What problems in general does corporate agribusiness cause? What are the present-day causes of suicide among family farmers? What problems does "farming and biodiversity" address? What are its recommendations? How are these related to the "clean farming revolution" (sustainable farming/agroecology, as discussed last week)? Describe either "the case of sugar" or "the story of beef" (in GPCC)