Take a deep breath. In a single intake of air, your lungs swell with roughly 25 sextillion molecules, ranging from days-old compounds, to those formed billions of years in the past. In fact, many of the molecules you're breathing were...

What happens to your atoms when you die? About 100 billion people have died since the dawn of humanity. Since the law of conservation of matter says that matter cannot be created or destroyed, all their atoms...

What are the major atmospheric pollutants and where do they come from? Discover what air pollution means for the environment and how it affects humans, from smog to acid rain. Earth Science - Human Impacts - Learning Points....

A substance that increases the rate of a chemical reaction without itself being permanently changed or used up. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...

In this video, we cover:<br/>
- What air po<br/>llution is
- What substances c<br/>ount as air pollutants- How those substances are made
- Why they're harmful / the problems they cause

It classifies pollutants based on different criteria and explains the type of hazard that they cause.

The video discusses atmospheric pollution and the effects of burning fossil fuels. It explains the pollutants created through combustion, such as carbon dioxide, particulates, carbon monoxide, sulfur dioxide, and nitrogen oxides. The...

The video explains how the combustion of fuels produces atmospheric pollutants, such as greenhouse gases, carbon monoxide, carbon particulates, sulfur dioxide, and nitrogen oxides. It describes the chemical reactions that occur during...

Dr. Bryan N. Duncan is a deputy project scientist for the Aura Mission at NASA's Goddard Space Flight Center in Greenbelt, Maryland.



He recently presented the story of air quality in three cities: Beijing, Los Angeles...

Snakes on a NASA plane! No, not that kind of snake. Donald Blake from the University of California Irvine with the #EarthExpedition ATom mission explains why "snakes" are part of the Whole Air Sampler from behind the scenes on the DC-8...

A flat line of data may not look interesting, but Tom Ryerson of NOAA with the #EarthExpedition ATom mission explains how it could reveal how tropospheric ozone is removed from the atmosphere. The ATom mission aboard NASA’s DC-8 flying...

To measure the background atmosphere you need a sensitive instrument. Róisín Commane of Harvard University with the #EarthExpedition ATom mission explains how her instrument uses lasers to detect greenhouse gases. The ATom mission...

Flying into "clean" air during #EarthExpedition ATom mission, Jack Dibbs of the University of New Hampshire explains what he expects to find on his aerosol filters as they travel to the remotest parts of the atmosphere. The ATom mission...

Learn the basics about the effect of air pollutants on health within environmental chemistry.