Climate Migrants Stand to Overwhelm World’s Megacities
From Dhaka to São Paulo, already crowded cities are unprepared to absorb people fleeing the effects of climate change.
Dengue fever is — unfortunately — having a banner year. Can it be quelled?
Case counts are skyrocketing in countries like Brazil and Peru and the virus is popping up in new turf, from Florida to Iran. What's the cause? And what's the solution?