Snot-filled whale research takes flight
Obama: world must reach climate deal in Paris 'while we still can'
Kerry warns of "climate refugees"
Homes at risk as Spanish fire burns out of control
Iraqi marshes face environmental crisis
Erika leaves south Florida soaked
Obama heads to Alaska, faces backlash
Mexican circus animals arrive in U.S.
Heavy rains drench Australia's southern coast
Sewage spill closes popular Hawaii beach
Volcano erupts on French island of Reunion
Wars improve air quality in the Middle East