Chapter 7

The U.K. Royal Society has put out a nice "questions and answers" about climate change that summarizes many of the things talked about in Chapter 7 (as well as the other chapters in the book).  Together with the U.S. National Academy of Sciences, they've also put out a longer report, Climate Change: Evidence & Causes, that covers much of the same ground.

The planet’s orbit

If you want to understand how the tilt of the planet affects how sunlight is distributed over the year, watch this video.

ENSO

Here is a video of the drinking bird, which is an analogue for internal variability of the climate system.