NASA's Terra satellite passed over Tropical Cyclone Ava as it continued moving away from the island nation of Madagascar. Ava was located in the Southern Indian Ocean, off the southeastern coast of the country.

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A team of researchers from the National University of Singapore (NUS) has pioneered a new water-based air-conditioning system that cools air to as low as 18 degrees Celsius without the use of energy-intensive compressors and environmentally harmful chemical refrigerants. This game-changing technology could potentially replace the century-old air-cooling principle that is still being used in our modern-day air-conditioners. Suitable for both indoor and outdoor use, the novel system is portable and it can also be customised for all types of weather conditions.

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Scientists at the University of Dundee have discovered that E. coli bacteria could hold the key to an efficient method of capturing and storing or recycling carbon dioxide.

Cutting carbon dioxide (CO2) emissions to slow down and even reverse global warming has been posited as humankind’s greatest challenge. It is a goal that is subject to considerable political and societal hurdles, but it also remains a technological challenge.

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Human activities are exposing US rivers and streams to a cocktail of salts, with consequences for infrastructure and drinking water supplies. So reports a new study in the Proceedings of the National Academy of Sciences that is the first to assess the combined, long-term changes in freshwater salinity and alkalization across the country.

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