Assess students' ability to evaluate environmental, economic, and social trade-offs and governance challenges of four large-scale carbon dioxide removal (CDR) methods — afforestation, BECCS, DACCS, and enhanced weathering. Tasks include comparing lifecycle emissions and permanence, land/water/biodiversity impacts, costs and energy demands, scalability and distributional effects; critiquing regulatory, MRV, financing, liability and public acceptance issues; and recommending equitable policy and monitoring priorities under uncertainty.