EarthShould we all get out of fossil fuels now? UN head Ban Ki-moon has urged divestment from fossil fuels. Premature posturing, says Paul Younger. No, it's vital and timely, insists Tim RatcliffeComment
HealthGlobal agency needed for battling infectious diseases Ebola underlines the urgent need for a new way of responding to global epidemics, say Harvey Rubin and Nicholas SaidelComment