Version 1
: Received: 13 July 2024 / Approved: 15 July 2024 / Online: 15 July 2024 (10:39:27 CEST)
How to cite:
Tsai, W. T. Environmental Policies and Countermeasures for Phase-Out of Ozone-Depleting Substances (ODS) over the Last 30 Years: Case Study in Taiwan. Preprints2024, 2024071142. https://doi.org/10.20944/preprints202407.1142.v1
Tsai, W. T. Environmental Policies and Countermeasures for Phase-Out of Ozone-Depleting Substances (ODS) over the Last 30 Years: Case Study in Taiwan. Preprints 2024, 2024071142. https://doi.org/10.20944/preprints202407.1142.v1
Tsai, W. T. Environmental Policies and Countermeasures for Phase-Out of Ozone-Depleting Substances (ODS) over the Last 30 Years: Case Study in Taiwan. Preprints2024, 2024071142. https://doi.org/10.20944/preprints202407.1142.v1
APA Style
Tsai, W. T. (2024). Environmental Policies and Countermeasures for Phase-Out of Ozone-Depleting Substances (ODS) over the Last 30 Years: Case Study in Taiwan. Preprints. https://doi.org/10.20944/preprints202407.1142.v1
Chicago/Turabian Style
Tsai, W. T. 2024 "Environmental Policies and Countermeasures for Phase-Out of Ozone-Depleting Substances (ODS) over the Last 30 Years: Case Study in Taiwan" Preprints. https://doi.org/10.20944/preprints202407.1142.v1
Abstract
It is well established that the reaction cycles involving some halogenated alkanes (so-called ozone-depleting substances, ODS) contribute to the depletion of ozone in the stratosphere, thus causing the Montreal Protocol (initially signed in 1987) and later amendments. The Protocol called for the scheduled phase-out of ODS, including chlorofluorocarbons (CFC), hydrochloro-fluorocarbons (HCFC), carbon tetrachloride (CCl4), halon, methyl chloroform (CH3CCl3), me-thyl chloride (CH3Cl), and even hydrofluorocarbons (HFCs). In view of the urgent importance of ozone layer protection to the globally ecological environment, the Taiwan government took regulatory actions on reducing ODS consumption since 1993 by the joint-venture of the central competent authorities. Under the regulatory requirements and the industry’s efforts by adopt-ing the alternatives to ODS and abatement technologies, the phase-out of some ODS (i.e., CFC, CCl4, halon, and CH3CCl3) have been achieved prior to 2010. The consumptions of HCFCs and methyl chloride have been significantly declined over the past three decades (1993-2022). However, HFC emission indicated a V-type variation during the period. Due to the local pro-duction and extensive use of HFC in Taiwan, its emissions increased from 663 kilotons of carbon dioxide equivalents (CO2eq) in 1993 to 2,330 kilotons of CO2eq in 2001, and then decreased to 373 kilotons of CO2eq in 2011. Since then, the emissions of HFC largely used as the alternatives to ODS showed an upward trend, increasing to 1,555 kilotons of CO2eq in 2022. To be in compliance with the Kigali Amendment (KA-2015) to the Montreal Protocol for mitigating global warming, the Taiwan government has taken regulatory actions in reducing the consumption of some HFC substances with high global warming potential (GWP) under the authorization of the Climate Change Response Act in 2023, aiming at the baseline consumption in 2024 by 80 % reduction by 2045.
Environmental and Earth Sciences, Atmospheric Science and Meteorology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
