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Evolving Air Quality Standards

Legal Planet

I am focusing on what are called the primary standards, which are health-based, and on two key pollutants, particulates and ozone, which have the greatest current importance. Ozone Pollution (Smog) Ozone standards are measured in parts per million (ppm) in the air. ppm in 2015. ppm in 2015. ppm, went up to 0.12

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The Problems with the SCOTUS ‘Good Neighbor’ Arguments

Legal Planet

EPA has been implementing the Good Neighbor Provision since the 1990s to successfully reduce significant contributions from power plants (and sometimes other types of big industrial sources) to ozone pollution (also called smog) in downwind States. EPA’s latest Rule finalizes federal plan requirements for 23 upwind States.

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Environmental Law: Government and Public Policy Towards the Environment

Environmental Science

Chlorofluorocarbons (CFCs) : A group of inert chemical used in many industrial and everyday processes such as our refrigerators that are not broken down at lower atmospheric levels and rise to the upper levels, destroying ozone. They are water vapor, carbon dioxide, methane, nitrous oxide, ozone, CFCs, and hydrofluorocarbons.

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Why is future sea level rise still so uncertain?

Real Climate

The CPDW is thought to be affected by the shift in the westerly winds around Antarctica which have increased in recent decades due to a combination of greenhouse gas forcing and the polar ozone hole ( Miller et al, 2006 ). Back in 2015, Pollard et al. 112-121, 2015. 2020) or Sadai et al. DeConto, and R.B. Clerc, B.M.

Sea Level 249
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Seeing the Earth through alien eyes: an extraterrestrial view of our planet

Physics World

The lines form a chemical fingerprint that could be used to find “biosignatures” such as oxygen or ozone. But to ensure their exoplanetary biosignature techniques work, they first want to test them out on the Earth, which is the only world we know of that does contain life. Luckily, in 2015, Jiang had an idea.

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Scanning the cosmos for signs of alien technology

Physics World

They do this by analysing the electromagnetic absorption spectra of an exoplanet’s atmosphere as it transits its sun, seeking the presence of gases such as oxygen, methane, water vapour and ozone (a proxy for oxygen). Possible signal?

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July 2017 Updates to the Climate Case Charts

Law Columbia

The court rejected the argument that claims against the original and 2012 versions of the LCFS were moot, noting that these earlier versions affected how credits were calculated under the 2015 version.

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