The trees exchange carbon dioxide and oxygen with the atmosphere through little “mouths” in their leaves and tiny “windows” ...

We all depend on oxygen to survive, but about 3 billion years ago ... the team reveals that we may have volcanoes to thank for the abundance of air that we breathe. During this study, scientists were ...

The sea mammals may actually be able to sense the amount of oxygen in their blood—something we humans can't do.

In this chapter, descriptions are provided on how, by our actions, we humans have altered the composition of the atmosphere. Many of these changes have occurred as a result of industrial processing ...

These pores are much like our mouths, except that while we inhale oxygen and ... chemicals in the air around them and exhale chemicals produced inside them – coffee breath for some people ...

You can’t see it, but it’s all around you. We’re talking, of course, about air. The air we breathe is a mixture of gases – about four-fifths is nitrogen, and another fifth is oxygen, which we need to ...

Take a deep breath. Do you ever think about the air entering your lungs ... a central role in the evolution of atmospheric oxygen. However, we think this would not have immediately led to ...

Researchers worldwide are increasingly alarmed by how pervasive these harmful particles are in the air humans breathe and the food ... Pyrolysis gas chromatography-mass-spectrometry helped ...