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Livestock farming and its products provide a diverse range of benefits for our day-to-day life. However, the ever-increasing demand for farmed animals has raised concerns about waste management and its impact on the environment. Worldwide, cattle produce enormous amounts of manure, which is detrimental to soil properties if poorly managed. Waste management with insect larvae is considered one of the most efficient techniques for resource recovery from manure. In recent years, the use of black soldier fly larvae (BSFL) for resource recovery has emerged as an effective method. Using BSFL has several advantages over traditional methods, as the larvae produce a safe compost and extract trace elements like Cu and Zn. This paper is a comprehensive review of the potential of BSFL for recycling organic wastes from livestock farming, manure bioconversion, parameters affecting the BSFL application on organic farming, and process performance of biomolecule degradation. The last part discusses the economic feasibility, lifecycle assessment, and circular bioeconomy of the BSFL in manure recycling. Moreover, it discusses the future perspectives associated with the application of BSFL. Specifically, this review discusses BSFL cultivation and its impact on the larvae's physiology, gut biochemical physiology, gut microbes and metabolic pathways, nutrient conservation and global warming potential, microbial decomposition of organic nutrients, total and pathogenic microbial dynamics, and recycling of rearing residues as fertilizer.

Fabrication of functionalized magnetite nanocomposites and their applications as catalysts for coupling reactions.

The Indian Ocean Experiment (INDOEX) was an international, multiplatform field campaign to measure long-range transport of air pollution from South and Southeast Asia toward the Indian Ocean during the dry monsoon season in January to March 1999. Surprisingly high pollution levels were observed over the entire northern Indian Ocean toward the Intertropical Convergence Zone at about 6°S. We show that agricultural burning and especially biofuel use enhance carbon monoxide concentrations. Fossil fuel combustion and biomass burning cause a high aerosol loading. The growing pollution in this region gives rise to extensive air quality degradation with local, regional, and global implications, including a reduction of the oxidizing power of the atmosphere.

Abstract Polygeneration is a sustainable energy concept, which could deliver multiple energy vectors (power, heat and cooling) and other useful products (desalinated water, hydrogen, etc.) by possible integration of suitable technologies. In this study, a polygeneration system for coastal area applications is driven by a hybrid solar/bio-oil boiler to produce the energy intensive products of cooling, power, desalinated water and hot air for drying. Solar thermal is the primary energy source to drive the polygeneration system, whereas the bio-oil boiler is the auxiliary source to drive it at non-sunshine hours. The performance characteristics of the hybrid system is investigated to identify the effects of various key parameters such as temperatures of heat source, sink and evaporator along with expander Built in Volume ratio. The obtained results at a typical operating condition show that the parabolic trough collector aperture area is 130 m2, the system produces net power output of 47 kW, desalinated water of 1.205 m3/h, 92 kW of hot air for drying and 141 kW of cooling. The overall energy and exergy efficiencies of the proposed system are found to be 22% and 87%, respectively.

The Circular Economy and Sustainability are among the greatest challenges faced by policymakers, producers, and consumers. Circular Economy processes demand less from the environment since they can minimize waste generation and, hence, can be powerful tools to combat the negative effects of climate change. Additionally, following subsidiarity principles, public policies supporting the Circular Economy should be designed at the lowest levels of public administrations-this provides huge opportunities for regional governments to design, implement and monitor these policies. This editorial of the special issue explores and discusses implications for those policies before introducing the five papers published in the special issue dedicated to policies for regional economy and sustainability. While some of the papers attempt to conceptualize sustainable development through a microeconomic perspective, others have a clear macroeconomic empirical focus. In consequence, this special issue provides a rich body of work for further Circularity and Sustainability nexus studies.

Gaseous and particulate chlorine species play an important role in modulating tropospheric oxidation capacity, aerosol water uptake, visibility degradation, and human health. The lack of recent global continental chlorine emissions has hindered modeling studies of the role of chlorine in the atmosphere. Here, we develop a comprehensive global emission inventory of gaseous HCl and particulate Cl- (pCl), including 35 sources categorized in six source sectors based on published up-to-date activity data and emission factors. These emissions are gridded at a spatial resolution of 0.1° × 0.1° for the years 1960 to 2014. The estimated emissions of HCl and pCl in 2014 are 2354 (1661-3201) and 2321 (930-3264) Gg Cl a-1, respectively. Emissions of HCl are mostly from open waste burning (38%), open biomass burning (19%), energy (19%), and residential (13%) sectors, and the major sources classified by fuel type are combustion of waste (43%), biomass (32%), and coal (25%). Emissions of pCl are mostly from biofuel (29%) and open biomass burning processes (44%). The sectoral and spatial distributions of HCl and pCl emissions are very heterogeneous along the study period, and the temporal trends are mainly driven by the changes in emission factors, energy intensity, economy, and population.

It is premature to sell carbon offsets from ocean iron fertilization unless research provides the scientific foundation to evaluate risks and benefits.