English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

HFC-23 (also known as CHF3, fluoroform or tri- fluoromethane) is a potent greenhouse gas (GHG), with a global warming potential (GWP) of 14 800 for a 100-year time horizon. It is an unavoidable by-product of HCFC- 22 (CHClF2, chlorodifluoromethane) production. HCFC- 22, an ozone depleting substance (ODS), is used extensively in commercial refrigeration and air conditioning, in the ex- truded polystyrene (XPS) foam industries (dispersive appli- cations) and also as a feedstock in fluoropolymer manufac- ture (a non-dispersive use). Aside from small markets in spe- cialty uses, HFC-23 has historically been considered a waste gas that was, and often still is, simply vented to the atmo- sphere. Efforts have been made in the past two decades to reduce HFC-23 emissions, including destruction (incinera- tion) in facilities in developing countries under the United Nations Framework Convention on Climate Change's (UN- FCCC) Clean Development Mechanism (CDM), and by pro- cess optimization and/or voluntary incineration by most pro- ducers in developed countries. We present observations of lower-tropospheric mole frac- tions of HFC-23 measured by "Medusa" GC/MSD in- struments from ambient air sampled in situ at the Ad- vanced Global Atmospheric Gases Experiment (AGAGE) network of five remote sites (2007-2009) and in Cape

atmospheric chemistry and physics

HFC-23 (CHF&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;) emission trend response to HCFC-22 (CHClF&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;) production and recent HFC-23 emission abatement measures