CLEAN : Progress at Iran nuclear talks after all night haggling

The video discusses the absence of sunlight and poses a question for viewers to consider.

What is the main topic discussed at the beginning of the video?

• The time of day

• The absence of sunlight

• The presence of sunlight

• The color of the sky

What does the video prompt the viewer to do at the end?

• Take a break

• Read a book

• Watch another video

• Answer a question