Two thirds of reef sharks and rays risk extinction: Study

Nearly two thirds of the sharks and rays that live among the world's corals are threatened with extinction, according to new research published Tuesday, with a warning this could further imperil precious reefs.

New tech to monitor climate change

Weather extremes have become more frequent and intensive since the 1950s, and international hydrology experts are using new technology to map land areas subject to hotter, dryer conditions under climate change.

Food early warning systems could stave off famines

As reliable sources of quality food diminish and record numbers of people are driven to hunger due to conflicts, climate change and economic downturns, feeding the global population of eight billion poses a major challenge ...

Land-based climate plans 'unrealistic': report

The world needs to set aside an area bigger than the United States for tree planting and other measures to meet climate pledges, according to research published Tuesday that warned against "unrealistic" carbon-cutting plans.

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