Tuesday on This Green Earth, Nell and Chris first speak with authors of a study which shows that, for the first time in almost 80 years, Black Bears are re-populating portions of eastern Nevada's Great Basin. Then, in the second half of the show, arborologist Jason Barto talks about the impacts the lack of snow is having on your trees, and how watering them - yes, this week - might be a good idea. It's This Green Earth, Tuesday at 9am.