Question

What two things did the narrator learn from a height of six miles?​

Answer 1

$\huge \colorbox{pink}{Answer}$

He found that valleys were populated which met the necessities of the people. When the jet went above six miles, there is more water than land on the earth. While appreciating the geographical niceties of our planet, the poet is unable to understand the tendency to build borders, to erect walls, to create fences

Hope it helps you...

@pari here...