To enable cities to adapt to extreme heat, authorities must clearly understand the risks and which solutions work best for whom. By Pablo Lazo and Eric Mackres

Hanoi’s air pollution crisis demands action in emission regulation, waste management and climate mitigation. By Vinod Thomas

Urban heat is a public health emergency, an infrastructure challenge and a climate crisis rolled into one. To safeguard cities and their most vulnerable populations, India needs city-level cost-effective long-term mitigation strategies. By Sanjay Seth and Yatin Choudhary

Hepatitis C treatment is no longer prohibitively expensive in the Global South because Malaysia, Thailand, Egypt and the Drugs for Neglected Diseases initiative developed ravidasvir – a low-cost antiviral. Such breakthroughs are possible for other neglected diseases if low- and middle-income countries agree to act collectively. By Timothy Radcliffe