Some approaches to tackling global warming can have unintended knock-on consequences for nature and the protection of biodiversity, say scientists urging
a more coordinated effort on these challenges.
In Britain, for example, an ostensibly sound policy of planting trees on wetlands backfired when in turn these carbon-rich landscapes dried up, releasing the planet-heating emissions stored in their roots and soil. Alison Smith, a researcher at the University of Oxford, said iron fertilization was “likely to cause massive environmental damage for uncertain climate gain.”
And building dams for hydroelectricity can block the passage of fish along waterways, reducing their populations. Installing “underwater curtains” to protect glaciers in Antarctica from warming waters — an idea floated at last year’s UN climate summit — could impede nutrient flow, Lars Smedsrud, from the University of Bergen, wrote in the journal Nature this year.
A 2020 study in the journal Global Change Biology concluded that “nature-based interventions were most often shown to be as effective or more so than alternative interventions for addressing climate impacts.”
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