Image Credit: NASA

Air quality is a measure of the pollution level in the air. Polluted air can be caused by many things. There are manmade and natural sources of emissions. 

NASA Earth Observations (NEO) strives to make global satellite imagery as accessible as possible. Here you can browse and download imagery of satellite data from NASA's constellation of Earth Observing System satellites.

The electromagnetic spectrum is comprised of all frequencies of electromagnetic radiation that propagate energy and travel through space in the form of waves. 

My NASA Data (MND) recognizes the importance of data literacy, especially in the Earth Sciences because data are the foundation of science.  But what does data literacy look like?

In addition to the changes brought about by natural forces, it has recently become apparent that a relative newcomer to planet Earth — the human being — has become a powerful agent of environmental change.

Review this page to learn about the background of volcanoes and their eruptions.

Phytoplankton distribution background information.