Tucson is exploring a transition to a publicly-owned electric utility, as customers complain about high bills and the city aims to cut its carbon footprint.

Explore news and insights on climate change, environment policies, global warming and sustainable practices with The New York Times Climate and Environment section.

A federal appeals court ruled on Friday that most of President Trump's global tariffs were illegal. The ruling explains the president exceeded his authority in using emergency powers to impose them.

A truly diverse student body — in experience, nationality, interests, and ambitions — is the foundation of the Harvard Business School experience.

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