Global evaluation of carbon neutrality and peak carbon dioxide emissions: current challenges and future outlook

Abstract

With the acceleration of urbanization and industrialization, carbon neutrality and peak carbon dioxide emissions have become common sustainability goals worldwide. However, there are few literature statistics and econometric analyses targeting carbon neutrality and peak carbon dioxide emissions, especially the publication trends, geographic distribution, citation literature, and research hotspots. To conduct an in-depth analysis of existing research fields and future perspectives in this research area, 1615 publications from the Web of Science Core Collection, between 2010 and 2020, were evaluated by using three analysis tools, under the framework of the bibliometrics method. These publications are distributed between the start-up (2010–2015) and the stable development (2016–2020) phases. Cluster analysis suggests three areas of ongoing research: energy-related carbon emissions, methane emissions, and energy biomass. Overall, future trends in this field include cumulative carbon emissions, the residential building sector, methane emission measurement, nitrogen fertilization, land degradation neutrality, and sciamachy satellite methane measurement. Finally, this paper further examines the most comprehensive coverage of nitrogen fertilization and the most recent research of the residential building sector. In view of the statistical clusters from 1615 publications, this paper provides new insights and perspectives for climate-environment-related researchers and policymakers. Specifically, countries could apply nitrogen fertilizer to crops according to the conditions of different regions. Additionally, experiences from developed countries could be learned from, including optimizing the energy supply structure of buildings and increasing the use of clean energy to reduce CO 2 emissions from buildings.

Abatement of Aromatic Contaminants from Wastewater by a Heat/Persulfate Process Based on a Polymerization Mechanism

“…Additionally, during conventional treatment organic carbon resources, which contain energy, are also wasted. If the organic pollutants are transformed into smaller compounds, the toxicity of the effluent needs to be evaluated due to the unknown toxicity of transformation products. , With the strategic goal of carbon neutrality and minimization of carbon dioxide emissions, the wastewater treatment industry should also move toward a low-carbon footprint.…”

Investigation on the Combustion Characteristics and Environmental Effects of Hydrogen-doped Natural Gas for Domestic Water Heaters

“…With the aim of achieving carbon neutrality and sustainable development, hydrogen energy has gained considerable attention due to its benefits of being clean, carbon-free, green, efficient, and renewable. − Nonetheless, the utilization of pure hydrogen is constrained by issues such as production, storage, transportation, and end-use. One promising solution for the large-scale implementation of hydrogen energy at a low cost is blending hydrogen into the current natural gas pipeline network and transporting it to end-users.…”

Bibliometric Analysis for Carbon Neutrality with Hotspots, Frontiers, and Emerging Trends between 1991 and 2022

“…Verhagen et al explored the material requirements and environmental regulations needed for the transition of future urban low-carbon heating technologies [18]. Combing through the existing literature, scholars have paid more attention to carbon-neutral approaches, technologies, fuels, and policies, such as carbon taxes and carbon markets [19], carbon capture and storage technologies [20] and negative-carbon technology [19], renewable clean energy [21], hydrogen and fuel cells [22], carbon footprints and low-carbon transformation [22], and emission reduction policies and mechanisms [20]. In addition, some scholars have also studied research progress, hotspots, and future development trends of carbon neutralization, but they were limited by the small data timespan and the small number of studies [23,24].…”