So this helium-3 is harvested by one person? Did they mention what it was in the movie? They really could have done a better job at creating interest in what he was doing up there. Which they didn't.
Yes they did. The beginning of the movie had a monologue (a commercial of sorts) where the speaker addresses what is going on [on the moon]. I suggest you watch it again. It is as follows:
"...where are we now? How do we make the world so much better? Make deserts bloom? Right now we are the largest producer of fusion energy in the world. The energy of the sun trapped in rock harvested by machine from the far side of the moon. Today we deliver enough clean-burning helium-3 to supply the energy needs of nearly 70% of the planet. Who would have thought, all the energy we ever needed, right above our heads. The power of the moon. The power of our future (Lunar Industries Ltd)."
There was only one person on the moon but he was not physically "mining" or "harvesting" the helium-3 by himself. There were a number of scenes where it showed a giant machine kicking up rocks. This machine was doing all the harvesting.
Ok, so he's heading home in 2 weeks. I would personally be dying in anticipation. FINALLY! Human contact! Seeing my family, my daughter, my wife! But they barely touch on ANY of these human emotions that would have made the over all thematic roots that much stronger. Instead we're left with a "meh."
I was under the impression that he was excited to be going home, until such time that he was presented with his clone. That seemed to take precedent over how he felt about returning.
As for the manner in which the two clones acted towards one another after seeing each other for the first time.. I too was confused at how calm they were. And I know this doesn't entirely justify the way they acted, but just keep in mind that the new clone was just brought to life and told by Gerty that he was suffering brain damage and the previous clone was in a serious accident and close to death. So neither of them were in their right state of mind.
And remember, this is a
science-fiction movie.