Carbon Dioxide, Oxygen Depletion, and the Mass Extinction in the Permian Era.

[NNadir]

4. Thank you!

I appreciate having readers, but if I have none, the writing these teaches me stuff, and forces me to learn things.

I understand that my strategy may not work in many places, but in New Jersey, there are several academic libraries that offer open access if you are physically in the library.

Rutgers will give you two hours a day on "guest computers" of which most of their libraries have several.

I pay to use Princeton's libraries, an annual fee, but some of their libraries are open for free at least for portions of the day.

These two libraries cover most of the world's scientific literature.

In other areas, MIT has a few open computers available for two hours a day.

I have a son in an out of town university with a very good library. If I can't get something, which is rare, I ask him and often he can fill in the blanks if he's not too busy.

The American Chemical Society website also allows you to search for open access papers directly.

Thanks much for caring about science.