Avoiding ecosystem and social impacts of hydropower, wind, and solar in Southern Africa's low-carbon electricity system.

The scale at which low-carbon electricity will need to be deployed to meet economic growth, electrification, and climate goals in Africa is unprecedented, yet the potential land use and freshwater impacts from this massive build-out of energy infrastructure is poorly understood. In this study, we characterize low-impact onshore wind, solar photovoltaics, and hydropower potential in Southern Africa and identify the cost-optimal mix of electricity generation technologies under different sets of socio-environmental land use and freshwater constraints and carbon targets. We find substantial wind and solar potential after applying land use protections, but about 40% of planned or proposed hydropower projects face socio-environmental conflicts.

The Health and Climate Benefits of Economic Dispatch in China's Power System.

China's power system is highly regulated and uses an "equal-share" dispatch approach. However, market mechanisms are being introduced to reduce generation costs and improve system reliability. Here, we quantify the climate and human health impacts brought about by this transition, modeling China's power system operations under economic dispatch.

Toward a low-carbon transition in India.

Electricity sector policies should be designed not only to mitigate carbon emissions but also to reduce inequities.

Least-cost targets and avoided fossil fuel capacity in India's pursuit of renewable energy.

India has set aggressive targets to install more than 400 GW of wind and solar electricity generation by 2030, with more than two-thirds of that capacity coming from solar. This paper examines the electricity and carbon mitigation costs to reliably operate India's grid in 2030 for a variety of wind and solar targets (200 GW to 600 GW) and the most promising options for reducing these costs. We find that systems where solar photovoltaic comprises only 25 to 50% of the total renewable target have the lowest carbon mitigation costs in most scenarios.

Bipolar Hemiarthroplasty of Hip in an Unstable Angina Patient: A Case Report.

Introduction: Fracture neck of femur is a leading cause of hospital admission in elderly population. Studies have shown up to 25% mortality following hip fracture within 1year of surgery [1]. We report a case of fracture neck of femur in a high-risk patient with end-stage renal disease who was operated with bipolar hemiarthroplasty.

Reconstruction of Mirror Foot with Dysplastic Tibia.

Introduction: The Mirror foot is a rare congenital anomaly associated with duplication of the structures of the foot. Verghese et al have classified these feet into three types. Type three is associated with a Dysplastic tibia of which only 5 have been reported.