Mangroves around the world are being wiped out. Not only does their destruction reduce the amount of CO2 being absorbed, it also releases CO2 stored in the sediment. Mangrove destruction makes up about 10% of emissions from deforestation worldwide. “Mangroves are among the most carbon-rich forests in the tropics,” said lead author Daniel Donato of the U.S. Department of Agriculture’s Forest Service in Hilo, Hawaii.
Read more at US Dept of Agriculture Forest Service