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In aviation, however, water vapor emitted in the atmosphere contributes to global warming (to a lesser extent than CO 2). [11] Liquid hydrogen also has a much higher specific energy than gasoline, natural gas, or diesel. [12] The density of liquid hydrogen is only 70.85 kg/m 3 (at 20 K), a relative density of just 0.07.
Regular, hexagonal ice is also less dense than liquid water—upon freezing, the density of water decreases by about 9%. [36] [e] These peculiar effects are due to the highly directional bonding of water molecules via the hydrogen bonds: ice and liquid water at low temperature have comparatively low-density, low-energy open lattice structures.
Productivity in surface waters therefore depends in part on the transfer of nutrients from deep water back to the surface by ocean mixing and currents. The increasing stratification of the oceans due to climate change therefore acts generally to reduce ocean productivity. However, in some areas, such as previously ice covered regions ...
Climate change is accelerating the melting of the world's mountain glaciers, according to a massive new study that found them shrinking more than twice as fast as in the early 2000s. The world's ...
The utility wants to build a new, green-hydrogen production facility that would provide hydrogen to power up clean fuel cells that could supply electricity in the evenings, or whenever the ...
By Valerie Volcovici (Reuters) - The Biden administration's climate agenda is facing an unexpected challenge in drought-prone Corpus Christi, Texas, where a proposed clean hydrogen hub would ...
Ice I h exhibits many peculiar properties that are relevant to the existence of life and regulation of global climate. [139] For instance, its density is lower than that of liquid water. This is attributed to the presence of hydrogen bonds which causes atoms to become closer in the liquid phase. [140]
Regular, hexagonal ice is also less dense than liquid water—upon freezing, the density of water decreases by about 9%. [17] These effects are due to the reduction of thermal motion with cooling, which allows water molecules to form more hydrogen bonds that prevent the molecules from coming close to each other. [16]