Harmful dioxins in Agent Orange, used to strip forests of their leaves, still linger in soil. Restoration work has been slow, and upheaval at USAID may slow it more.

Experts are calling for the end of human-driven mangrove loss, a doubling of the area of mangroves with effective conservation status, and the restoration of half of recently lost mangroves.

As sea levels rose around this low-lying island nation, soil salinity increased beyond what even the salt-tolerant mangrove trees could handle.

Scientists have monitored mangroves in Mauritius, and found some forests are growing.

Blue carbon is stored in mangroves, seagrass and sediments. Discussions at the UN Ocean Decade conference reiterate the importance of preserving existing sea floor habitats, before it’s too late.

One of the most damaging invasive species in the oceans has breached a major barrier – the Amazon-Orinoco river plume – and is spreading along Brazil’s coast. Scientists are trying to catch up.

Facing human threats, Mumbai’s Koli community are taking risk reduction into their own hands – other vulnerable coastal settlements should take note.

‘Blue carbon’ habitats can store a lot of carbon – but not reliably enough to offset emissions.