En gang fantes det hval og hai her. Nå haster det for å redde livet i Oslofjorden. Det siste året er krisen blitt enda mer akutt, ifølge eksperter og fagfolk.
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Flytende algematter slik som dette, kan komme til å spre seg videre utover i Oslofjorden, hvis ikke mottiltak blir iverksatt. Foto: Hartvig Christie/NIVA (Foto: Hartvig Christie/NIVA)
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