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Study finds high-density, low-rise cities such as Paris may be optimal urban form for reducing life cycle GHG emissions

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There is a growing belief that building taller and denser is better. These results contend the claim that building taller is the most efficient way to meet growing demand for urban space and instead show that denser urban environments do not significantly increase life cycle GHG emissions and require less land. —Jay Arehart.

Emissions 476
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Successful trial of seabed polymetallic nodule collector suffers temporary stranding of robot on ocean floor

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A pre-prototype seabed polymetallic nodule ( earlier post ) collector being tested on the Pacific Ocean floor by Global Sea Mineral Resources ( GSR ) has become detached from its lifting cable on its final dive and is sitting on the ocean bed 4.5 kilometers beneath the surface. billion by the 2060s.

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Study found highly elevated PM2.5 in pre-COVID-19 subway air in NE US; NYC the worst

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concentrations and particle composition from area samples collected in the subways of Philadelphia, Pennsylvania; Boston, Massachusetts; New York City, New York/New Jersey (NYC/NJ); and Washington, District of Columbia. Ruzmyn Vilcassim (2021) “PM 2.5

New York 418
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Covanta Energy and Clean Energy partner to build natural gas stations at Covanta facilities

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The first Clean Energy CNG station at a Covanta facility will open at the Essex County Resource Recovery Facility in Newark, NJ later this month. The station will provide CNG fuel for the growing numbers of CNG refuse trucks that serve communities and businesses throughout the Northern New Jersey and New York City area.

Clean 218
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SW/TCH Maritime funds the construction of hydrogen fuel cell e-ferry

Green Car Congress

SW/TCH Maritime (SW/TCH), an impact investment platform building the first fleet of zero-emissions maritime vessels in the US, announced its investment to construct and own the ‘Water Go Round’ e-ferry in collaboration with Golden Gate Zero Emission Marine ( GGZEM ), a provider of turn-key hydrogen fuel cell power systems for ships.

Hydrogen 275
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Tesla Megapacks power NineDot Energy’s battery storage site in the Bronx, NYC

Teslarati

MWh Tesla Megapack battery system is its first energy storage site in the Bronx, New York City. Meeting this target means that the company could help the local power grid by providing stable, reliable, and clean power to New York City households and businesses.

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NYU review study suggests potential for gauging health risks of air pollution on individual level

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Though other parallel projects may well be in planning elsewhere, we describe this initiative, which is currently being applied in New York City, as a pilot study for the method applied in a very large metropolitan area. —Caplin et al. billion a year. —Masoud Ghandehari.

Pollution 191