Acehnese plant mangrove trees at the site of a former housing development which was destroyed by last December’s tsunami in Meuraksa near Banda Aceh April 11, 2005. The local government and Acehnese started planting thousands of mangroves in the area after the tsunami devastated the city. REUTERS/Tarmizy Harva en/KSWould you pay $1,000 a year for a remote patch of mangrove swamp?

Maybe not — but more and more environmental economists are arguing that you should.