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This paper investigates the association between relative mobile broadband penetration (i.e. mobile broadband connections in total mobile connections) and carbon dioxide (CO 2) emissions globally. The study is based on 181 countries for the period 2002–2020. The results indicate an initial increase in CO 2 emissions for a country at an average emission level once mobile broadband is introduced. Possible explanations might be initial investment in network infrastructure and increased consumption of electricity. However, on average for the period 2002–2020 the continuous relationship between mobile broadband (defined as speeds of at least 256 kb/s) and CO 2 is significantly negative in a statistical sense, i.e. emissions at a country level significantly reduce as mobile broadband penetration increase. Based on a two-stage model and controlling for additional independent variables (i.e. GDP per capita, population density, the share of electricity consumption that comes from fossil fuel, industry as a share of GDP, a regulation index, fixed broadband penetration, working age population as a share of total population and a human capital index), we conclude that on average a 10 percentage points increase in relative mobile broadband penetration causes a 7 percent reduction of CO 2 emissions per capita (given that the instrumental variable strategy, as assumed, identifies causal effects). Thus, the results shows that investments in mobile infrastructure over longer periods of time can contribute to mitigating climate change. However, the relationship is only significant for high-income countries (i.e. countries with a GNI of $4096 or above). The results remain significant when mobile broadband is defined as mobile broadband connections per 100 inhabitants. • Initially, the introduction of MBB leads to increasing CO 2 -emissions. • Over time, increased MBB penetration leads to significantly reduced CO 2 -emissions. • A 10% increase in MBB penetration causes a 7% reduction in CO 2 -emissions per capita. • Investment in MBB over time help mitigating climate change in high-income countries. [ABSTRACT FROM AUTHOR]

• The extent of flooding in China is greater than in any other country. • Nearly 66% of China's landmass is submerged by flooding. • Financial toll of flooding accounts for approximately 1.42% of the annual GDP. • Various forms of climatic change contribute to flooding. The extent of flooding in China is more significant than in any other country. Our research reveals that approximately 66 % of China's landmass is submerged by flooding, affecting about 50 % of the population. Furthermore, the financial toll of flooding now accounts for approximately 1.42 % of the annual gross domestic product (GDP), which is almost 40 times higher than the corresponding figure for the United States. We have observed that Zhengzhou city in Henan province, which faced a devastating flood in 2021, received a significant amount of rainfall, specifically a total of 552.5 mm within a 24-hour period. The floods in Henan province in 2021 caused considerable damage, including impacting nearly 15 million people, resulting in almost 400 deaths, damaging over 10,000 square kilometers of agricultural land, causing almost $19 billion in economic losses, and leading to the collapse of over 35,000 households and damage to various properties. In a similar manner, the significant flooding that occurred in southern China in 2020 impacted approximately 7.1 million individuals across eight provinces and resulted in 54 fatalities, the collapse of 6,700 houses, and incurred a direct economic loss of US$3.33 billion. We found that rainstorms have significantly increased to 10 % in the last 60 years in China. In this paper, we delved into exploring the existing published articles, reports, and government and authoritative legal texts to analyze the causes and impacts of flooding in China's flood-prone regions and potential mitigation strategies to reduce the repercussions of distressing flood events. We believe this study will help policymakers by providing new insights while formulating policy to reduce the loss caused by high-level flooding. [ABSTRACT FROM AUTHOR]