Updated free-science-books.md

[mattu08]

What does this PR do?

Added Resource

Description

Added Green Chemistry book.

Why is this valuable (or not)

Green chemistry is chemistry for the environment. It is really a philosophy and way of thinking that can help chemistry in research and production to develop more eco-friendly solutions.

How do we know it's really free?

It is Free.

For book lists, is it a book?

It is a book.

Checklist:

• [x] Not a duplicate
• [x] Included author(s) if appropriate
• [x] Lists are in alphabetical order
• [x] Needed indications added (PDF, access notes, under construction)

[eshellman]

Thanks, and welcome to free-science-books!

[mattu08]

Thanks @eshellman looking forward to contributing some more, it's a pretty useful project. 👍