Over the last year, there has been a surge of interest in the problem of ocean plastic pollution. The media drumbeat began with the now-infamous turtle video, continued through National Geographic’s year-long “Planet or Plastic” series, and hit a new high with the BBC release of “Blue Planet ll.”

South Africa’s largest city proudly notes that it has one of the world’s largest urban forests. But an invasive insect has been killing Johannesburg’s trees by the tens of thousands, and baffled experts are scrambling to find ways to stop it.

Whatever you want to call the rising use of shared bikes, scooters and vehicles — micro-mobility, Mobility-as-a-Service, shared active transportation — the trend isn't just about cool new gadgets, making investors incredibly wealthy or ticking off slow-moving cities

The latest UN report on climate says reducing deforestation is crucial to slowing global warming.

It's the final call, say scientists, the most extensive warning yet on the risks of rising global temperatures.

It’s time to face climate change with acceptance. Not acquiescence, not resignation.

Following years of extremely high and low temperatures, catastrophic hurricanes, droughts, floods, forest fires and sea-level rises eating away at valuable shorelines, the American people share a growing awareness of climate change.

The past year has seen a significant uptick in concern by activists, companies and others about the impacts of plastic pollution on people and the environment.

As climate change risk rises, economies are adapting to curb its harmful effects. What cities are doing to mitigate these risks is coming into focus.