A pair of identical, sportscar-sized satellites are poised to zoom around the Earth and track changes in water and ice, offering new insights into global warming and sea level rise, NASA said Monday.

Groundwater, oceans, lakes, rivers and ice sheets will be monitored by the Gravity Recovery and Climate Experiment Follow-On (GRACE-FO), a joint mission between the U.S. space agency and German Research Center for Geosciences (GFZ).

Authorities in Hawaii have warned of dangerous "laze" fumes as molten lava from the erupting Kilauea volcano reached the Pacific Ocean.

Two lava flows "reached the ocean along the southeast Puna coast overnight," on Hawaii's Big Island, the US Geological Survey, which monitors volcanoes and earthquakes worldwide, said in a statement Sunday.

Entire communities living under the shadow of a smouldering volcano on an island in Vanuatu will be permanently relocated to another island from next week, the Pacific nation's government has decided.

Australia said Sunday the culling of wild horses in a unique national park would be banned despite fears the animals were threatening native species.

Helicopters were rushed in to rescue four trapped residents after lava flowing from Hawaii's Kilauea volcano isolated a cluster of homes, local officials said late Friday, one day after the volcano erupted and shot a huge plume of ash miles (kilometers) into the sky.

The European Commission said Thursday it is taking Germany, France, and four other countries to the bloc's highest court for failing to comply with EU air quality standards.

Yellow is the new green in the French Caribbean archipelago of Guadeloupe.

Former California Governor Arnold Schwarzenegger urged U.S. President Donald Trump to join action to support renewable energy, at a summit on climate change in the Austrian capital Vienna Tuesday.

Groups of Maine citizens want the U.S. state to strengthen its law cutting greenhouse gas emissions.

The state's current emissions standards are set by a 2003 law. The citizens' proposal calls for an 8 percent reduction of greenhouse gas emissions annually that by 2035 would reduce Maine's emissions to approximately 75 to 85 percent below 2003 levels.

Hunched over the soil, Malagasy villagers work feverishly -- deft fingers planting stalks of mangrove to replace the swathes destroyed for firewood and building material.