“Extinction: The Facts” (PBS — documentary premiere, March 31)

Owing largely to the devastating global effects of climate change on natural habitats, scientists, ecologists and conservationists have made the dire prediction that as many as one million species face the imminent threat of becoming extinct. That’s bad news not just for these myriad creatures, but also the countless other animals whose lives are affected by the presence of these endangered species. Sir David Attenborough explores the topic of extinction and how this crisis has consequences for us all, even making more pandemics increasingly likely.