Explainer: Tonga’s volcanic eruption may harm environment for years, scientists say

Tonga’s massive underwater volcanic eruption could deliver long-lasting damage to coral reefs, erode coastlines and disrupt fisheries, say scientists studying satellite images and looking to the past to project the future of the remote region...Tonga’s exclusive economic zone of nearly 700,000 marine square kilometres (270,271 square miles) is 1,000 times larger than its land area. And most Tongans get their food — and livelihood — from the ocean.

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