You know what should be invented?
A robot that can suck away the pencil lead or pen ink or printer ink that's written/printed on the paper. So that I can reuse and recycle the paper by using it over and over again. Isn't that wonderful?
Save Gaia, save the Earth ;D & of course, plant more trees.
If I may borrow the words that Qh said,
Qh:"
It will never happen Rachel.. Ah, the robot is the eraser"
Me: =.=Qh: "
You so bo liao"
Lol. I'm not bo liao, just thinking of how to save the Earth...while studying HAP's Endocrine System. Lol!