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Synergistic photocatalysis of magnetic Fe 3 O 4 /CdS/ZnO nanocomposite for efficient and recyclable removal of tetracycline and Eosin Y

Scientific Reports, Published online: 27 August 2026; doi:10.1038/s41598-026-67465-2 Synergistic photocatalysis of magnetic Fe 3 O 4 /CdS/ZnO nanocomposite for efficient and recyclable removal of tetracycline and Eosin Y

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A historic turning point: The world on the brink of population decline

By Murray Hunter FOR the first time in human history, global fertility appears to have fallen below the replacement level, setting the stage for an eventual decline in the world’s population.

  • Global population projected to peak at 9 billion in 2056 before declining
  • Fertility rates fall below replacement level of 2.2 children per woman globally
  • Declining fertility poses challenges for aging societies and labor markets

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