Climate change is such an enormous and unwieldy thing that it often feels hard to see, like trying to comprehend the Titanic while standing six inches away from its hull. In Tales of Two Planets, writer and editor John Freeman tries to make the danger clear by offering readers a range of views — fiction, essays, even poetry, spanning locations from Florida to the Himalayas — while zeroing in on the way that global warming intersects with disparities. Writers in the collection, edited by Freeman, include Margaret Atwood and Edwidge Danticat.