Climate tipping points are thresholds within Earth’s climate system beyond which change becomes self-reinforcing and, in some cases, irreversible on human timescales. Rather than unfolding gradually, ...

We know by now that climate change can’t be ignored. Now and then, though, we stumble upon a new reason to embrace climate change mitigation techniques with a renewed sense of urgency. This might be ...

Over the past 18 months, many city dwellers have started waking up to the sound of birds singing outside their windows and rays of morning sunlight stemming from clearer skies. Increased biodiversity ...

A brother and sister were negotiating Christmas presents with their parents. The boy asked for five dollars per day for the 12-day holiday, prompting nods of approval. The girl asked for just 50 cents ...