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Best CO2

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Best 1 Roger Revelle

Roger Revelle (1909–1991) was a prominent American oceanographer who served as the director of the Scripps Institution of Oceanography. He was a pioneer in the study of global warming, co-authoring a landmark 1957 paper with Hans Suess that predicted atmospheric carbon dioxide accumulation from foss...

2 Andernach Geyser

The Andernach Geyser is a unique cold-water geyser located in the Eifel region of Germany. Activated by dissolved carbon dioxide beneath the surface, it produces powerful eruptions without significant heat. Constructed in 1903, it holds the Guinness World Record for the tallest cold water geyser. Sc...

3 Orbiting Carbon Observatory-2

The Orbiting Carbon Observatory-2 (OCO-2) is a NASA satellite launched in 2014 to measure global atmospheric carbon dioxide concentrations from a polar orbit. It features three high-resolution grating spectrometers that track the detailed molecular absorption of sunlight reflected by the Earth's sur...

4 Furna do Enxofre

Furna do Enxofre is a volcanic cave on Graciosa Island in the Azores, Portugal, featuring an underground lake and active sulfur fumaroles. The cave's geothermal environment maintains warm temperatures, supporting unique microorganisms. It is accessible via a spiral staircase for guided tours.

Fumarole Active Portugal Azores CO2 Fumarolic Cave
5 Herľany Geyser

The Herľany Geyser is a cold-water geothermal spring located in the village of Herľany in eastern Slovakia. Unlike geothermal geysers, it is driven by accumulating carbon dioxide rather than heat, which forces groundwater to the surface. The geyser was formed in 1872 during an effort to drill for mi...

6 Kikhpinych Death Valley fumaroles

Kikhpinych is a stratovolcano on the Kamchatka Peninsula in eastern Russia. On its eastern flank lies a geothermal area known as Death Valley (Dolina Smerti), where fumaroles emit carbon dioxide, hydrogen sulfide, and other gases that accumulate in topographic depressions. Animals including bears, f...

7 Crystal Geyser

Crystal Geyser is a rare, cold-water geyser located on the banks of the Green River near the town of Green River, Utah. Unlike geothermal geysers, its eruptions are driven by expanding carbon dioxide gas rather than heat, originating from a 1935 oil exploration well that inadvertently tapped an unde...

Geyser Utah Cold Water CO2 Green River
8 Soda Springs Geyser

Soda Springs Geyser is a human-made, cold-water geyser in Soda Springs, Idaho. It originated in 1937 when drilling for a hot-water source encountered a pressurized underground system containing carbon dioxide and water, producing recurring eruptions rather than geothermal boiling. The flow is now re...

9 Mammoth Mountain fumaroles

The Mammoth Mountain fumaroles in California, USA, are notable for diffuse carbon dioxide emissions that have killed nearby trees, marking active magmatic unrest since 1989.

Fumarole California Active CO2 Long Valley Tree Kill
10 Floriano de Lemos Geyser

Floriano de Lemos Geyser is a carbon dioxide-driven cold-water geyser in Caxambu, Minas Gerais, Brazil, within the Parque das Aguas.

11 Dieng Timbang Crater

Dieng Timbang Crater is a CO2 vent on Indonesia's Dieng Plateau, a complex where toxic gas killed 149 people during the 1979 eruption.

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