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“Less sea ice in the future will likely also mean an expanding anthropogenic footprint in the Arctic,” Johnson said.

Lower concentrations of anthropogenic aerosols in the atmosphere, especially due to stricter regulations on marine fuel, are likely a contributing factor.

Carbon dioxide is one of the chief anthropogenic greenhouse gases that contributes to climate change; the others are methane, water vapor, nitrous oxide and fluorinated gases.

Conversely, anthropogenic soundscapes, like traffic or aircraft noise, are hypothesized to have negative effects on human health and wellbeing in a variety of ways.

"Our findings reveal a critical threshold for anthropogenic CO2 emission, beyond which crop yield starts to decrease significantly," said Misra.