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Scanning the cosmos for signs of alien technology

Physics World

While neither idea was ever implemented, both were examples of a “technosignature” or a “technomarker” – a tell-tale indication of past or present technological activity, pointing out the existence of an advanced planetary civilization. Frank is looking at what kind of signature a planet’s technology might leave in its spectra.

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Glossary of Greenhouse Gas Terms

Greenbuilding Law

Albedo The amount of solar radiation reflected from an object or surface, often expressed as a percentage. volume mixing ratio), together with a number of trace gases, such as argon (0.93% volume mixing ratio), helium, radiatively active greenhouse gases such as carbon dioxide (0.035% volume mixing ratio), and ozone.

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

Physics World

By predicting our planet’s appearance across interstellar space, we can tease out the tell-tale signatures of habitability, biology and even technology. By predicting our planet’s appearance across interstellar space, we can tease out the tell-tale signatures of habitability, biology and even technology. New eyes on alien worlds.

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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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Celebrating Ozone Layer Protection Milestones of the Clean Air Act

EPA

Principal Deputy Assistant Administrator for the Office of Air and Radiation. Ozone layer protection in the United States reaches an important milestone in 2020. Environmental Protection Agency (EPA) has been helping to protect and heal the Earth’s stratospheric ozone layer by phasing out ozone-depleting substances (ODS).

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Back in Black: Creating positive changes by focusing on a short-lived pollutant

HumanNature

Significant Economic and Environmental Gains Can Be Achieved by Applying Best Available Technology in the Oil Sector in the Arctic.” AMAP Assessment 2015: Black Carbon and Ozone as Arctic Climate Forcers.” Compounds that can absorb energy are important because they alter the radiative balance of our Earth’s atmosphere. Arctic Council.

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Environmental Perspectives

Environmental Science

There are only 6 NAAQS - ozone, carbon monoxide, particulates, lead, sulfur dioxides, and nitrogen dioxides - but they dominate most air quality concerns ranging from smog to health effects, such as from particulates and lead. There remain some problem areas; for example Boston tends to be a non-attainment area for ozone in the summer.