science

posted by .

how is the air we breath today different from 3.6 billion years ago?

http://en.wikipedia.org/wiki/Earth's_atmosphere#Evolution_of_the_Earth.27s_atmosphere


http://eesc.columbia.edu/courses/ees/climate/lectures/earth.html

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Earth Science

    How are distances in space measured? What is the nearest star to Earth beyond the sun and how far away is it?
  2. Science 2

    What is the critical temperature at which hydrogen can fuse into helium in the star’s core?
  3. science

    Look at the picture on the immediate left here: http://en.wikipedia.org/wiki/Earth's_magnetic_field Also: http://image.gsfc.nasa.gov/poetry/magnetism/magnetism.html HOW IS THE EARTH'S MAGTISM USEFUL thanks it helped me alot!!!!!!!!!!!
  4. science

    The atmosphere is composed of a mixture of _______________, _____________ ____________, and tiny___________________. Thank you for using the Jiskha Homework Help Forum. The origin of our atmosphere is still open to a great deal of …
  5. earh science

    earths early atmosphere formed during the archean era. Which gas was generally absent from the atmosphere at this time http://en.wikipedia.org/wiki/Earth's_atmosphere#Evolution_of_the_Earth.27s_atmosphere
  6. SoCiAl(again)

    Which Enlightenment writer expressed the idea that the relationship between government and the people it governs is a social contract?
  7. social studies

    what are the type of rocks used to build the agra fort , gate way of india,lotus temple , qutub minar , india gate and jama masjid Read each one carefully: http://en.wikipedia.org/wiki/Agra_Fort http://en.wikipedia.org/wiki/Gateway_of_India …
  8. Comp.

    Could anyone help me Please.. about the uses of the computer on the following fields. 1.Business 2.Arts and Films 3.Music 4.Engineering 5.Manufacturing 6.Police and Laws Enforces 7.Medicine 8.Education 9.Science and Research 10.Archeology …
  9. computers? I think just a question.

    what are some process used in different organizations to download and imput paper information into computerized systems so other can analyze?
  10. University of Botswana

    Define Ethics and show how it relates to Metaphysics and Epistemology. Check these sites. http://en.wikipedia.org/wiki/Ethics http://en.wikipedia.org/wiki/Epistemology http://en.wikipedia.org/wiki/Metaphysics Why are we here on Earth?

More Similar Questions