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Topic Review
Reducing Phosphorus Pollution of Freshwater Fish Farms
Water soluble phosphorus, uneaten feed, feces, and metabolic waste from farmed fish increase phosphorus concentrations in adjacent waters. In open freshwater fish farms, in particular, the effects can be more immediate, as excess phosphorus is introduced directly into ecosystems. Several intestinal enzymes, transporters, and regulating factors have been implicated in farmed fish dietary phosphorus retention. To reduce phosphorus pollution from open flow fish farms, a thorough understanding of the processes that affect nutrient retention and absorption, as well as the impact of dietary factors, anti-nutritional substances, and intestinal morphology, is required. 
  • 377
  • 22 Nov 2023
Topic Review
Reducing Phosphorus Loads
The wide application of fertilizers in tile-drained agricultural systems commonly results in the loss of phosphorus (P) to the underground tile drains during precipitation events and emission to downstream surface waters. As different catchments are subject to local geological and climatic conditions, among other factors, it is observed a large spatiotemporal variation in the dynamics of P emissions, including the load and dominant form (i.e., particulate or dissolved). In-farm practices may be able to mitigate this problem to some extent (e.g. by optimizing the P application), but may not suffice in areas saturated with P. Therefore, systems designed to reduce the excess P loads at relatively low costs and located at the edge of tile-drained catchments have been tested and implemented. This has been done by increasing the hydraulic residence time of the drainage discharge, allowing sedimentation of particles and biogeochemical processes between the water, soil/sediments and biota to occur; by trapping P at the bank of watercourses; and by enhancing the retention of dissolved P with filters rich in P sorbents. The retention of P by these measures, however, can be rather variable and largely depends on the catchment conditions. Thus, a series of considerations, e.g., in regards to design parameters, long-term stability of the P retained and retention of different P forms, must be taken into account, including major constraints (e.g., use of agricultural land), to ensure successful application of edge-of-field measures and achieve the desired cost-efficiency.
  • 1.4K
  • 01 Nov 2020
Topic Review
Reducing Inequalities within and among EU Countries
Reducing inequalities within and among countries is one of the main tenets of the sustainable development paradigm and has become an important pillar at the European Union level. By adopting the 2030 Agenda for Sustainable Development, EU countries have committed themselves to meeting targets against which progress in reducing inequalities can be measured. Through the present research, it can analyze and assess the extent to which EU countries will achieve the specific SDG 10 targets. Based on data published by Eurostat for the period 2010-2020, it can forecast the trends of the indicators until the year 2030, using a model based on AAA (Holt-Winters) version of the exponential smoothing (ETS), to assess the degree to which the assumed targets will be reached. For more detailed information, dynamic indices were used to analyze the dynamics of the progress achieved. The results showed that it is difficult to clearly distinguish one or more countries as part of a group of high or low performers in terms of the efforts made and the effects achieved in reducing inequalities. However, it can be mentioned that Poland as a good and very good performer on most of the indicators analyzed. At the opposite, Bulgaria and Greece, for which more attention and involvement is needed in adopting measures to correct the negative trends forecast.
  • 453
  • 07 Jul 2022
Topic Review Peer Reviewed
Reducing CO2 in Passivhaus-Adapted Affordable Tropical Homes
On average, houses including those in the tropics are responsible for almost 39% of the global carbon emission caused by non-renewables, first and foremost by fuel. Looking at the worldwide map of residential buildings’ contribution compared with commercial, the worldwide national maximum of 33.5% CO2 of housing is caused by residential buildings in Uzbekistan. In an overwhelming number of most countries, their values are significantly lower, due to comparably lower energy demand than commercial buildings and because affordable homes increasingly use small PV to cater for their own basic needs. However, with the rising temperature and a likewise growing imperative to cool homes from about 30 °C onwards basically by split-unit air conditioners, the residential houses’ portion of CO2-emission might dramatically increase to survive such more common hot periods in the future. In combination with air conditioners needing some airtightness, the first purpose of this entry is to show that by 2050 in tropical regions, there will be no alternative to relatively airtight houses if the temperatures rise at the present speed. This is one alternative to an uncontrollable and life-threatening migration of millions of people to cooler but still livable regions in 2050. To trigger necessary changes toward homes that can better avert the heat, using the method of qualitative comparative content analysis, passive houses (PH) have emerged as adaptations to the tropical climate. Therefore, the second purpose of this in-depth study with the perspective of social science, is to reveal a comparative closer qualitative look at the tropicalized PH-approach. It is probably the most civilized building energy-saving strategy on the planet and can systematically keep the threatening increasing heat outside. However, before utilizing the concept, herein need to investigate why PH-technology as a whole concept with all its modules discussed earlier has been very slow to “go South” into the tropical region (the original PH will be referred to as “PH1”). The reason is that some qualitative differences of the more affordable and more simplistic tropicalized “PH2” make it easier and more realistic to penetrate the market, without letting go meaningful R&D-insights of PH1. As a probably facilitating future solution, the result is the triple-tabled option to utilise more synergies between the usually closed PH1 and the more open and flexibly naturally ventilated PH2. Unlike the PH-platform, ZEMCH is a related concept which tries to cater specifically to the significantly growing market for lower-income homes to go for carbonless energy. The conclusion is that scaling for residential buildings as mass products using passive house technology in combination with ZEMCH could turn out to become an important topic. It comprises the question in how far low or no carbon affordable homes based on the PH-concept in combination with ZEMCH-applications also may come into play as standard and to help mother Earth’s struggle for survival.
  • 1.3K
  • 03 Feb 2023
Topic Review
Reducing Carbon Emissions from Maritime Tourism
Reducing the carbon emissions from hotels on non-interconnected islands (NII) is essential in the context of a low carbon future for the Mediterranean region. Maritime tourism is the major source of income for Greece and many other countries in the region, as well as hot-temperate and tropical regions worldwide. Like many NIIs, Rhodes attracts a high influx of tourists every summer, doubling the island’s energy demand and, given the high proportion of fossil fuels in the Rhodian energy supply, increasing carbon emissions.
  • 190
  • 15 May 2023
Topic Review
Reduced Fertilization and Biochar Supplementation on Soil Fertility
Generally, the partial substitution of chemical fertilizer with palm silk biochar (PSB) at a low application rate may not substantially reduce plant-available NO3−-N and Olsen-P. It can also contribute to the sustainable availability of N and P in vegetable farmland soil via a variety of transformation processes, such as mineralization, immobilization, and loss.
  • 443
  • 15 Oct 2021
Topic Review
Reda Mansour
Reda Mansour (Arabic: رضا منصور, Hebrew: רדא מנצור‎) is an Israeli-Druze poet, historian and diplomat. He has published three books of Hebrew poetry and received the University of Haifa Miller Award as well as the State President Scholarship for young writers. Mansour was born (1965) in the Druze village of Isfiya in northern Israel. He has a Ph. D from the University of Haifa's Middle East History Department and a graduate of Harvard's Kennedy School of Government where he was a Wexner Israel Fellow. He studied Spanish in Salamanca University (dating back to 1218, is the oldest and also one of the most prestigious universities in Spain), and a general studies semester in the Hebrew University in Jerusalem. His field of research is the Changes in the Perception of Identity and Social Environment as Evident in the Intellectual Discourse in Syria During the Third Decade of the "Corrective Movement" 1988-2003.
  • 250
  • 20 Oct 2022
Topic Review
Recycling Strategies of Plastic Packaging Waste in China
Given their exceptional performance, plastic packaging products are widely used in daily life, and the dramatic expansion in plastic packaging waste (PPW) has exacerbated environmental problems. Many countries have enacted laws and developed recycling technologies to manage plastic packaging waste in consideration of the nature of PPW as both garbage and a resource. As the world’s largest producer and consumer of plastics, China has also taken measures to address this issue.
  • 179
  • 23 Nov 2023
Topic Review
Recycling Phosphorus from Agricultural Streams
Phosphorus (P) is a crucial element for producing crops and is widely used in both recycled manure and inorganic fertiliser. Its cycle has a high impact on the total environment, interfacing the hydrosphere and the pedosphere, and being heavily dependent on the biosphere and anthroposphere. The grey P adsorbents are based on waste materials from the steel industry, which ensure a high rate of P removal but do not allow for its direct reuse as fertiliser. Green P adsorbents are vegetable wastes; they are abundant, locally available, low-cost, and eco-sustainable, but the challenge is certainly their transport. A limitation to the reuse and recycling of agricultural by-products is seeking reusability at all costs, without evaluating the technical and economic feasibility; extra interventions are frequently proposed (i.e., applying high temperatures or adding expensive synthetic molecules to modify the pH). In general, the most promising feasibility is given by its direct use as a soil conditioner or by composting it as a by-product, as the only pre-treatment.
  • 519
  • 01 Dec 2022
Topic Review
Recycling of Spent Li-Ion Batteries
Lithium-ion batteries (LIBs) are a widely used energy storage technology as they possess high energy density and are characterized by the reversible intercalation/deintercalation of Li ions between electrodes. The rapid development of LIBs has led to increased production efficiency and lower costs for manufacturers, resulting in a growing demand for batteries and their application across various industries, particularly in different types of vehicles. In order to meet the demand for LIBs while minimizing climate-impacting emissions, the reuse, recycling, and repurposing of LIBs is a critical step toward achieving a sustainable battery economy.
  • 260
  • 01 Feb 2024
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