New Zealand is embarking on a $200 million project to restore its biggest harbor by planting more than 20 million locally produced native trees on erosion-prone land. The long-term, catchment-wide Kaipara remediation combines Maori and western science and will involve many stakeholders, including 1,500 farmers. The project aims to reduce the 700,000 tons of sediment flowing into Kaipara Harbour, main breeding ground for the key snapper fishery. An earlier tree-planting project in Whāingaroa Harbour reduced sediment by 90% and improved water quality and fishing catches.

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