LifeDrug-resistant HIV set for rapid upsurge A model of the emergence of drug-resistant forms of the virus in San Francisco suggests they could spread across the world ¿ìè¶ÌÊÓÆµ
EarthAvoiding dangerous warming by 2100 'barely feasible' It may be impossible to get low-carbon energy sources online fast enough to prevent global temperatures rising beyond 2 °C by the century's end ¿ìè¶ÌÊÓÆµ