To "invent" is "to originate or create as a product of one's own ingenuity, experimentation or contrivance."
I found this image <here> in Pinterest, but there's, unfortunately, no link to who the crafts[person] is.
Whoever it was did not invent the plastic soda bottle, did not invent the greenhouse roof, but certainly had the ingenuity to merge the two ideas into an effective solution... and for free!
There are a lot of very clever "third-world" solutions using these plastic bottles, one involving water, a bit of bleach and a hole in the roof.
Here's that very clever "ceiling light."
The story of it <here>.
This "third-world genius" is illustrated in these inventive solutions, if not "inventions" as we usually think of them. I'll be telling more of these stories in this blog.