This app from NASA gives readers a peek into the constantly fluctuating elements of the earth’s atmosphere. Using 3D models constructed from satellite images, the app visually displays the causes and effects of climate change via surface air temperature, carbon dioxide and carbon monoxide levels, and sea level height anomalies among others. Fascinating for students, teachers, and anyone interested in climate change, Earth-Now is compatible with Apple devices running iOS 5.1+ and Android devices running 4.0+.