Tag Archives: Carbon dioxide

Environment News: Coral Reefs


Coral Reefs

A coral reef is a ridge of living coral, coral skeletons, and calcium carbonate deposits from organisms such as calcareous algae, mollusks, and protozoans. The resulting structure provides a critical habitat for a wide variety of fish and marine invertebrates. Coral reefs also protect shores against erosion by causing large waves to break and lose some of their force before reaching land. More than 90% of the estimated 109,800 sq mi (284,300 sq km) of reefs in the world are in what region? More… Discuss

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Japan’s Underwater City


Japan’s Underwater City

A Japanese construction firm with a penchant for pie-in-the-sky projects has a new plan: an underwater city. The Shimizu Corporation, a prominent builder that once pitched a space hotel, has proposed an undersea spiral off the coast of Japan that would stretch 2.8 miles (4.5 km) down to the sea floor. A habitable zone would be situated in a massive sphere just below the surface, and energy would be generated by thermal energy conversion and by using micro-organisms to turn carbon dioxide into methane. However, the company says the required technology won’t be ready for another 15 years. More… Discuss

this pressed: Woman undergoing anti-freckles treatment with carbon dioxide, 1930s — OnThisDay & Facts


this day in the yesteryear: Toxic Gas Erupts from Lake Nyos (1986)


Toxic Gas Erupts from Lake Nyos (1986)

Lake Nyos is a deep lake located in the crater of an inactive volcano in Cameroon. A pocket of magma beneath the lake leaks carbon dioxide (CO2) into the water. In 1986, possibly as the result of a landslide, Lake Nyos suddenly emitted about 1.6 million tons of CO2. Denser than air, the CO2 cloud “hugged” the ground and descended down nearby valleys, suffocating approximately 1,700 people within 16 miles (25 km) of the lake. What methods are being used to prevent future disasters here? More… Discuss

Rising Carbon Dioxide Levels Could Make Crops Less Nutritious


Rising Carbon Dioxide Levels Could Make Crops Less Nutritious

Nutrient levels in staple food crops may fall as carbon dioxide levels in the atmosphere continue to rise. Researchers grew wheat, rice, soybeans, corn, sorghum, and field peas in fields subjected to carbon dioxide concentrations anticipated on Earth by the middle of this century. In four out of the six crops, zinc and iron levels were found to be reduced. The wheat and rice also had a reduced protein content. Sorghum and corn alone were able to resist the effects of the elevated carbon dioxide levels. More… Discuss

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