A Systematic Review on the Climate and Ecosystem Change Associated With the COVID-19 Epidemic: Global Challenges

The most serious current challenge in the world is COVID-19 disease incidence. With the spread of COVID-19, in addition to widespread human and economic damages, concerns have increased about the world’s climate and ecosystem change. This change alters the genetic structure of viruses, leading to newer strains. This study addressed global challenges regarding the COVID-19 epidemic effects and possible two-way changes in climate and ecosystems. Studies conducted from 2019 to 2022 were reviewed in this systematic review. Articles on climate and ecosystem change related to the COVID-19 epidemic were searched in the Scopus, Web of Science, and PubMed databases in accordance with the MeSH search strategy using keywords such as "Climate Change" and "Ecosystem" or "COVID-19". In this research, the coding method based on the PRISMA chart was used, and 13 related articles were included in the study after qualitative evaluation. The COVID-19 epidemic is likely to have significant implications for progress in climate and ecosystem change. The phenomenon of climate change and its interaction with the COVID-19 epidemic is not limited to natural issues. One of the most important consequences is its impact on the social and economic issues of human societies, the most important of which are air pollution and environmental degradation. An increase in normal and special wastes, water consumption and wastewater production, air pollution after the start of the global economy, damage to forests and animals, and tendencies to use fossil fuels are only a part of the direct and indirect negative effects of COVID-19 on climate and ecosystem change. Epidemics directly threaten people and the health system, while climate and ecosystem change more broadly weakens natural and human systems. The COVID-19 crisis requires solutions within weeks and months, whereas responses to the climate and ecosystem change crisis seem less acute. However, the effects of climate and ecosystem change worsen with further procrastination. Thus, such crises with overlapping conditions and interactions require more attention and immediate public mobilization. Thus, the necessary planning should be implemented to moderate and reduce its effects

Spatio-Temporal Evolution of the Thermo-Hygrometric Index (THI) during Cold Seasons: A Trend Analysis Study in Iran

Global warming can cause deep and extensive changes in the Earth’s climate and changes in the time and place of climatic phenomena. The present trend analysis study assesses cold stress using the thermo-hygrometric index (THI) in the two seasons of autumn and winter in outdoor environments in Iran. The data related to the average of the two variables of daily air temperature and relative humidity from 60 synoptic meteorological stations for a statistical period of 30 years were obtained from the Iranian Meteorological Organization. The THI index was calculated for autumn and winter, and the level of thermal discomfort was determined for each station. The Mann–Kendall statistical test with the help of Minitab ver17.1.0 software was also used to investigate the changes in air temperature, relative humidity and THI index. The THI for autumn increased in 68% of the stations, and this increasing trend is statistically significant in 51% of these stations. The THI for winter increased in 83% of the stations, and this increasing trend is statistically significant in 51% of these stations. In autumn, 53% of the stations were in the range of thermal discomfort, and in winter only 5% were in the range of thermal comfort. The decreasing trend in THI in some climatic types, along with the increasing trend in air temperature, can indicate the decrease in relative humidity in the monitored stations during the studied years. It is recommended to know the temporal and spatial distribution and the probability of occurrence of cold stress through the use of THI in order to adopt preventive measures and policies in the outdoors in Iran

Spatio-Temporal Evolution of the Thermo-Hygrometric Index (THI) during Cold Seasons: A Trend Analysis Study in Iran

Global warming can cause deep and extensive changes in the Earth’s climate and changes in the time and place of climatic phenomena. The present trend analysis study assesses cold stress using the thermo-hygrometric index (THI) in the two seasons of autumn and winter in outdoor environments in Iran. The data related to the average of the two variables of daily air temperature and relative humidity from 60 synoptic meteorological stations for a statistical period of 30 years were obtained from the Iranian Meteorological Organization. The THI index was calculated for autumn and winter, and the level of thermal discomfort was determined for each station. The Mann–Kendall statistical test with the help of Minitab ver17.1.0 software was also used to investigate the changes in air temperature, relative humidity and THI index. The THI for autumn increased in 68% of the stations, and this increasing trend is statistically significant in 51% of these stations. The THI for winter increased in 83% of the stations, and this increasing trend is statistically significant in 51% of these stations. In autumn, 53% of the stations were in the range of thermal discomfort, and in winter only 5% were in the range of thermal comfort. The decreasing trend in THI in some climatic types, along with the increasing trend in air temperature, can indicate the decrease in relative humidity in the monitored stations during the studied years. It is recommended to know the temporal and spatial distribution and the probability of occurrence of cold stress through the use of THI in order to adopt preventive measures and policies in the outdoors in Iran

The Incidence of Lung Cancer and Smoking in Iran, Turkey, England, and the USA: A Comparative Study

Objectives: Lung cancer is the deadliest and the costliest cancer in the world. In this study, we compared the situation of this disease in several countries by considering the most important risk factor of lung cancer (smoking). Methods: This is a comparative study, a comprehensive one which was done on lung cancer rates in four countries: Iran, Turkey, England, and the USA, during the past twenty years (2002-2021). Age-standardized rate (ASR) index and the percentage of smokers were extracted from available information in the World Health Organization (WHO) databases, The Organization for Economic Co-operation and Development (OECD) Health Statistics 2021, and other valid related articles. After comparison, control procedures were examined. Results: England, with an ASR of 46, has the highest rate of lung cancer, and Iran, with an ASR of 21, has the lowest rate. Turkey has the highest percentage of smokers (29.3%), and the lowest percentage belongs to Iran (20%). Regarding the increasing trend of the ASR index, lung cancer in Iran and Turkey has had an upward trend, and England and the United States have a downward trend. Taxes on cigarettes are a significant factor in smoking reduction. Among these 4 countries, the lowest cigarette tax belongs to Iran (4.83%). Discussion: The result of this study shows that the incidence of lung cancer in Iran is rising, so following successful countries in imposing cigarette taxes can be an effective step to reduce smoking. Training programs, cultural improvement, and new diagnostic methods can also be useful in reducing lung cancer ASR