Atmosphere of Earth relatively warm air above a colder one), and in others by a zone which is isothermal with height. Although variations do occur, the temperature usually declines with increasing altitude in the troposphere because the troposphere is mostly heated through energy transfer from the surface. Thus, the lowest part of the troposphere (i.e. Earth's surface) is typically the warmest section of the troposphere. This promotes vertical mixing (hence, the origin of its name in the Greek word τρόπος, "tropos", meaning "turn"). The troposphere contains roughly 80% of the mass of Earth's atmosphere. The troposphere is denser than all its overlying atmospheric
Last Day on Earth (The Walking Dead) 10 in his review and commented, "For all that "Last Day on Earth" was really about, and what was important about it, it went on too long. And then failed to deliver a satisfying exclamation point. Instead, we got another fake out/cliffhanger. A technique this show is absolutely over indulging in. Jeffrey Dean Morgan was terrific as Negan though." Zack Handlen of "The A.V. Club" gave the episode a C, the lowest grade given by the website for the show to date, faulting the episode for awkward, drawn-out writing and forced story arcs which couldn't maintain an atmosphere of suspense