climate change

Haiti's once-flourishing coffee trade has been badly battered. The latest threat: climate change. Locals who still rely on coffee for their livelihood must learn to grow it in changing climes.

Federal funds are supporting two different disaster-prevention approaches — coastal retreat, or people leaving flood zones, and coastal defense, or building infrastructure to protect at-risk areas.

Flooding from extreme tidal swings was once just a rare nuisance for coastal cities. But rising sea levels have increased the frequency of these nuisance floods as much as tenfold since the 1960s.

"There is such a thing as being too late," President Obama says in his address to the U.N. Climate Summit. The White House is touting tools to boost "global resilience" in the face of climate change.

The People's Climate March was timed to draw the notice of world leaders gathering for this week's U.N. Climate Summit in New York.

Studies warn that climate change will threaten corn production in coming decades. Meanwhile, farmers are experimenting with new planting methods in hopes of slowing soil erosion from torrential rains.

Projections suggest that climate change will hurt agriculture in most parts of the world. But some areas of the U.S. could actually see a benefit as corn production moves farther north.