Why advertisers pay more to reach viewers who watch less

A new study finds that viewers' income and likelihood of buying a product are not the factors that determine how much it costs to reach them— it's how active they are on the platforms where the ads run.

Study underscores uncertain costs of iron fertilization

As society grapples with the intensifying consequences of climate change, decision-makers are increasingly looking to carbon dioxide removal as a necessary complement to emission reductions. One of the strategies that has ...

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