The term "net zero" remains ill-defined among the public. So what is it? Why is it necessary, and how does it fall short of solving all our climate woes?

The new, hotter normal requires urban planners and city governments to consider heat hazards when creating climate action plans.

Trees get all the credit. But for biodiversity, look down, too.

In such a pristine landscape, even a few thousand people can have a major ecological impact.