Recently Helm (2020) provides an excellent review and preliminary assessment of the environmental impacts of the Coronavirus. He concludes that “The evidence from the pandemic is that it is not the case that decoupling has occurred at the global level, or even at the European level. Emissions and GDP have both fallen sharply” (p. 3). Using the case of Taiwan, this study provides a local evidence to support Helm (2020)’s proposition. GDP and emissions in Taiwan have been highly correlated in the coronavirus pandemic. However, we found that there exists a significant asymmetry of the correlation (or coupling) between GDP and CO2 emission under each period of prosperity and depression from 2005 to 2020. In this respect, the analysis of the causal link between CO2 emission and GDP under the depression period like that in the coronavirus pandemic cannot be considered as a trivial duplicate of the analysis under the prosperous period.