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The analysis compares four scenarios for Africa's emissions: Business-as-usual (BAU), Net-zero by 2050 (NZ50), Net-zero by 2070 (NZ70), and Net-zero by 2100 (NZ100). While all net-zero pathways see renewables become the dominant energy source and a sharp fall in fossil fuel reliance, the timing of the transition creates significant trade-offs. The NZ50 scenario achieves the fastest emissions decline, reaching -0.33 GtCO₂/yr by 2050, but incurs the highest marginal abatement cost (averaging $78 per ton of CO₂) and causes the most disruption to food systems, including a 31% contraction in cropland and a near doubling of staple food prices. All net-zero scenarios rely on bioenergy with carbon capture and storage (BECCS), which shifts water demand from agriculture to the energy sector. Regional challenges vary, with Western Africa facing steep decarbonization due to oil and gas reliance, and Southern Africa managing a coal-dependent system.