A multi-model assessment of the Global Warming Potential of hydrogen

A multi-model assessment of the Global Warming Potential of hydrogen

With increasing global interest in molecular hydrogen to replace fossil fuels, more attention is being paid to potential leakages of hydrogen into the atmosphere and its environmental consequences. Hydrogen is not directly a greenhouse gas, but its chemical reactions change the abundances of the greenhouse gases methane, ozone, and stratospheric water vapor, as well as aerosols. Here, we use a model ensemble of five global atmospheric chemistry …

The ozone contingency in the ZMVM is maintained for this year; following the lack of winds and solar radiation, informs CAMe.

The levels of pollution in the Mexican capital do not yield. For the second time in just a fortnight, the air of the Metropolitan Zone of the Valley of Mexico again records levels of ozone harmful to health.The Environmental Commission of the Megalopolis has maintained the environmental contingency plan on Wednesday.The action plan includes reducing displacements among citizens, restricting the circulation of vehicles and reducing activities tha…

Ground-level ozone pollution poses growing threat to planetary health

Kilometers above the Earth’s surface, the ozone layer protects humanity and all life from the sun’s harmful ultraviolet rays. But in the troposphere, at ground level, this gas can wreak havoc on planetary health in myriad ways. As temperatures increase due to climate change, the ozone problem is forecast to worsen in many parts of the world — including heavily populated urban and rural areas in the tropics. Ground-level zone isn’t a direct emiss…

Rising ground-level ozone pollution endangers planetary health

Ground-level ozone is a major air pollutant that shortens human lives and kills thousands each year, resulting in major economic impacts. It is formed when methane, nitrogen oxides and volatile organic compounds (released from vehicles, industry, power plants and crops) react in the presence of sunlight.

The Suspension of the Atmospheric Environmental Contingency for Ozone in the Valley of Mexico today 2 April 2025 was announced by the Environmental Commission of the Megalopolis (CAME) after weather conditions allowed the dispersion of pollutants. This means that ozone levels decreased to acceptable levels, eliminating the need to maintain restrictions in vehicle circulation and in industrial activities. How does the suspension of the contingenc…