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Resultados de la búsqueda

Mostrando ítems 1 a 9 de 43245.
  1. Library Resource
    Capa: Andre Dib / WWF-Brasil

    Um alerta em saúde pública e uma ameaça à segurança alimentar

    Informes e investigaciones
    Mayo, 2023
    América del Sur, Brasil

    A ciência tem mostrado nas últimas décadas que a conta- minação por mercúrio (Hg) é um problema ambiental e de saúde pública. Uma importante fonte poluidora é o garim- po ilegal de ouro, que vem crescendo vertiginosamente, deixando um rastro de destruição. Outras atividades rea- lizadas por seres humanos, incluindo o desmatamento, a queimada de florestas e a construção de hidrelétricas, au- mentam os níveis de contaminação por mercúrio em cor- pos d’agua e no ambiente.

  2. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2023
    Alemania

    There exists no single optimal way for transporting hydrogen and other hydrogen carriers from one port to the other globally. Its delivery depends on several factors such as the quantity, distance, economics, and the availability of the required infrastructure for its transportation. Europe has a strategy to invest in the production of green hydrogen in Africa to meet its needs.

  3. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2023
    Alemania

    There exists no single optimal way for transporting hydrogen and other hydrogen carriers from one port to the other globally. Its delivery depends on several factors such as the quantity, distance, economics, and the availability of the required infrastructure for its transportation. Europe has a strategy to invest in the production of green hydrogen in Africa to meet its needs.

  4. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2020
    Italia

    Diversification has been increasingly recognized as a rewarding farm strategy through which farmers produce on-farm non-agricultural goods and services. In doing so, farmers employ farm inputs (capital, labor, and land) in products other than agricultural goods, with the aim to sell them in the market and increase their income. While a significant body of literature has explored the drivers affecting the adoption of diversification activities, so far little attention has been given to the impact of such adoption on the technical and financial performance of farms.

  5. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2020
    Global

    The use of anionic polyacrylamide (PAM) as a soil conditioner could help prevent soil loss by water. In this study, we determined the effective granular PAM rate that best reduces runoff and soil loss from Oxisols. Furthermore, the effectiveness of the selected PAM rate was tested by applying it in a mixture with gypsum (G) or lime (L).

  6. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2020
    China

    Traditional farming practice of rice field co-culture is a time-tested example of sustainable agriculture, which increases food productivity of arable land with few adverse environmental impacts. However, the small-scale farming practice needs to be adjusted for modern agricultural production. Screening of rice field co-culture farming models is important in deciding the suitable model for industry-wide promotion. In this study, we aim to find the optimal rice field co-culture farming models for large-scale application, based on the notion of food productivity.

  7. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2020
    Pakistán

    Agriculture is an important engine for economic growth and a vigorous driver of poverty reduction in developing countries. In Pakistan, rice production is one of the most essential sectors. However, it has been underperforming, largely because of low women’s participation, which is often a crucial resource in agriculture and the rural economy. Unfortunately, previous studies have seldom recognized and emphasized the role of women in triggering agricultural and rural development.

  8. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2020
    China

    Topsoil is required to be stripped and reused to maintain land productivity in mining and construction activities. However, as a great threat to unprotected soil, wind erosion on topsoil replacement sites has not received enough research attention, which hinders the efficient implementation of wind erosion control measures in the right time and place on a national scale. This study aims to evaluate wind erosion on unprotected topsoil replacement sites (WEUTRS) in mainland China, examining its spatiotemporal pattern and demonstrating its significance for the relevant research and industry.

  9. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2020
    Global

    Land cover patterns in sub-Saharan Africa are rapidly changing. This study aims to quantify the land cover change and to identify its major determinants by using the Drivers, Pressures, State, Impact, Responses (DPSIR) framework in the Ethiopian Gozamin District over a period of 32 years (1986 to 2018). Satellite images of Landsat 5 (1986), Landsat 7 (2003), and Sentinel-2 (2018) and a supervised image classification methodology were used to assess the dynamics of land cover change.

  10. Library Resource

    Sustainability

    Publicación revisada por pares
    Enero, 2023
    Global

    Coastal lands are often affected by salinization, which leads to a deterioration of soil structure and a decrease in land productivity. As a widely used soil amendment, biochar has been proven to improve poor soil properties and promote crop growth and N adsorption and utilization. However, the effects of biochar on soil fertility, N use efficiency (NUE) and balance in coastal salt-affected soil have rarely been reported.

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