Los Sistemas vitales de la Tierra, en peligro: al ritmo actual un tercio de las tierras cultivables habrá desaparecido dentro de 20 anos
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| Format: | article biblioteca |
|---|---|
| Language: | spa |
| Subjects: | Human activities effects, Agricultural land, Land use, Crops, Agroforestry, Forest management, Ecosystems, Ecological balance, Soil erosion, Urbanization, Sedimentation, Cultivation, Aquatic ecosystems, Marine ecosystems, Terrestrial ecosystems, Developed countries, Developing countries, |
| Online Access: | https://unesdoc.unesco.org/ark:/48223/pf0000041041_spa |
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