I've had some courses with the girls who are running the AbsolutAgronom blog (in Swedish), if you're interested in agronomy, I recommend you to check it out.
I wanted to spread the word about the book they recommend in their blog. The book is written by agronomist Johan Rockström and photographer Mattias Klum. The English version of the book is called The Human Quest-prospering within planetary boundaries.
I posted a video of Johan Rockström's TedX talk on planetary boundaries in my post from the Sustainability Day 2012. Rockström and Klum hope to inspire us and world leaders with their book to change our relationship towards our planet, to open our eyes to what is happening around us and to start living within the planetary boundaries. It's released just in time for Rio+ 20. Here is a video with the authors talking about the book.
I hope to get my hand on a copy!