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Topic Review
Preparation of Gaseous Biofuels from Kitchen Waste
Kitchen waste is an important component of domestic waste, and it is both harmful and rich in resources. Biofuels generally refer to solid, liquid or gaseous fuels made from biological organisms and their metabolic excretions. Biofuels are pollution-free, locally available, sustainable and reliable. Biodiesel, bioalcohols (ethanol and butanol), biomethane, and biohydrogen are the typical representatives of gaseous and liquid biofuels.
  • 466
  • 17 Mar 2023
Topic Review
Progress and Prospects of Forest Ecological Asset Research
There are several key scientific issues, these seven issues are hot research topics worthy of in-depth exploration in the future: the harmonizing of the definition of the concept of forest ecological assets; what should be the main focus of future research on forest ecological assets; the construction of an evaluation indicators system according to local conditions; the data assimilation methods of integrating ground-based positioning observations and space-based remote-sensing observations that complement each other; the study of the spatial and temporal heterogeneity of forest ecological assets; the study the net value of forest ecological assets; how to retain and increase the value of forest ecological assets; and how enhance the ecological carrying capacity of forests. These issues require further research.
  • 465
  • 07 Feb 2022
Topic Review
Holiday Lighting Technology
Holiday lighting technology has been subject to considerable development and variation since the replacement of candles by electric lights. While originally used during the Christmas holidays as Christmas lights, modern electric light arrays have become popular around the world in many cultures and are used both during religious festivals and for other purposes unconnected to any festivities.
  • 465
  • 04 Nov 2022
Topic Review
Policies and Responses of Microplastics
Although (micro)plastic contamination is a worldwide concern, most scientific literature only restates that issue rather than presenting strategies to cope with it. The knowledge are assembled on policies and responses to tackle plastic pollution, including peer-reviewed scientific literature, gray literature and relevant reports to provide: (1) a timeline of policies directly or indirectly addressing microplastics; (2) the most up-to-date upstream responses to prevent microplastics pollution, such as circular economy, behavioral change, development of bio-based polymers and market-based instruments as well as source-specific strategies, focusing on the clothing industry, tire and road wear particles, antifouling paints and recreational activities; (3) a set of downstream responses tackling microplastics, such as waste to energy, degradation, water treatment plants and litter clean-up strategies; and examples of (4) multifaceted responses focused on both mitigating and preventing microplastics pollution, e.g., approaches implemented in fisheries and aquaculture facilities.
  • 465
  • 09 Jan 2023
Topic Review
Cocoa Bean Shell
Cocoa bean shell (CBS) is one of the main solid wastes derived from the chocolate industry. This residual biomass could be an interesting source of nutrients and bioactive compounds due to its high content in dietary fibres, polyphenols and methylxanthines. 
  • 465
  • 11 May 2023
Topic Review
Toxicity and Physicochemical Properties of Trifluoroacetic Acid
Trifluoroacetic acid (TFA) is a known and persistent pollutant in the environment. Although several direct anthropogenic sources exist, production from the atmospheric degradation of fluorocarbons such as some hydrofluorocarbons (HFCs) has been a known source for some time. The current transition from HFCs to HFOs (hydrofluoroolefins) is beneficial from a global warming viewpoint because HFOs are much shorter-lived and pose a much smaller threat in terms of warming, but the fraction of HFOs converted into TFA is higher than seen for the corresponding HFCs and the region in which TFA is produced is close to the source. Therefore, it is timely to review the role of TFA in the Earth’s environment.
  • 465
  • 27 Mar 2024
Topic Review
COVID-19 on Global CO2 Emissions
CO2emissions from global domestic aviation were reduced by 31.93% (−116.49 MtCO2) in 2020 compared to 2019 (). There were two occurrences where global aviation emissions were considerably reduced in 2020, one in Asia close to the end of January and another during the implementation of lockdown measures worldwide in mid-March. Global international aviation was greatly affected by the worldwide lockdowns, which showed a reduction in emissions of 72% in July 2020 compared to July 2019.
  • 464
  • 13 Aug 2021
Topic Review
Nostocyclopeptides
Nostocyclopeptides (Ncps) are a small class of bioactive nonribosomal peptides thus far identified only in cyanobacteria of the genus Nostoc. They are composed of six-seven amino acid residues and contain a unique imino linkage formed between C-terminal aldehyde and an N-terminal amine group of the conserved tyrosine. Nostocyclopeptides occur both in cyclic and linear form.
  • 464
  • 05 Nov 2021
Topic Review
Plasmid-Mediated Transfer of Antibiotic Resistance Genes in Soil
Due to selective pressure from the widespread use of antibiotics, antibiotic resistance genes (ARGs) are found in human hosts, plants, and animals and virtually all natural environments. Their migration and transmission in different environmental media are often more harmful than antibiotics themselves. ARGs mainly move between different microorganisms through a variety of mobile genetic elements (MGEs), such as plasmids and phages. The soil environment is regarded as the most microbially active biosphere on the Earth’s surface and is closely related to human activities. With the increase in human activity, soils are becoming increasingly contaminated with antibiotics and ARGs. Soil plasmids play an important role in this process.
  • 464
  • 26 Apr 2022
Topic Review
Climate Change and Its Impact on Crops
Plants are a highly advanced kingdom of living organisms on the earth. They survive under all climatic and weather variabilities, including low and high temperature, rainfall, radiation, less nutrients, and high salinity. Even though they are adapted to various environmental factors, which are variable, the performance of a crop will be compensated under sub/supra optimal conditions. 
  • 464
  • 22 Dec 2022
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