NASA's Earth-Now is an iPhone application that provides a visual representation of recent global climate data collected by Earth Science satellites. The app allows users to explore various environmental conditions such as surface air temperature, carbon dioxide levels, carbon monoxide levels, ozone levels, water vapor, gravity, and sea level variations.

The data sets are presented through "false color" maps, with color-coded legends indicating the relative strength or weakness of each environmental condition. Users can interact with the app by rotating the 3D model of the Earth with a single finger stroke and zooming in or out by pinching two fingers.

Developed by the Earth Science Communications and Visualization Technology Applications and Development Teams at NASA's Jet Propulsion Laboratory, Earth-Now offers a unique and accessible way to understand and visualize global climate data. It is a valuable educational tool for anyone interested in Earth science and climate change.