Heart in Voh, New Caledonia (20Â°57'S, 164Â°41' E)
Mangrove swamps such as this one seen near Voh, New Caledonia cover nearly 25 percent of the world's coastal areas. That's just half their original range; exploitation of resources, agricultural and urban sprawl, and pollution have caused their demise. Vegetation gives way to bare spots, such as this heart-shaped one, where seawater rarely reaches.
Photo by Yann Arthus-Bertrand