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Hydrogen gas, as a combustible fuel, does not contribute to global warming when burned.

A research team from City University of Hong Kong has developed an efficient artificial photocatalytic system that converts CO2 in water into methane using light.

A joint research team from City University of Hong Kong (CityU) and collaborators recently developed a stable artificial photocatalytic system that is more efficient than natural photosynthesis. The new system mimics a natural chloroplast to convert carbon dioxide in water into methane, a valuable fuel, very efficiently using light. This is a promising discovery, which could contribute to the goal of carbon neutrality.

Researchers have uncovered the atomic mechanisms that make a class of compounds called argyrodites attractive candidates for both solid-state battery electrolytes and thermoelectric energy converters. The discoveries -- and the machine learning approach used to make them -- could help usher in a new era of energy storage for applications such as household battery walls and fast-charging electric vehicles.

An analysis of data for more than 58,000 women in the U.K. Biobank found that both short (less than 21 days) or long (more than 35 days) menstrual cycles were associated with the development of cardiovascular disease, heart attack or atrial fibrillation (AFib). Short or long menstrual cycle length was associated with a 19% higher risk of heart disease among those women compared to women with menstrual cycle length between 22 to 34 days. Irregular menstrual cycle length was associated with a 40% higher risk of atrial fibrillation.