Would you please help with example of Paradox on some people's waste is other's income?

Question

If some one can help to get paradaox , some people waste is other peoples income. I will appreciate.

Answer 1

Easy.  I may 'waste' money playing slots in Vegas.  That money goes to pay the salaries of casino workers.  My waste, their income.

Answer 2

China buys our waste (recycleable materials like cardboard), recycles it, and uses it to package stuff that we buy (boxes for toys). The cycle repeats itself. Or waste is China's income.

It's like how one man's trash is another man's treasure.

If someone gets a new laptop, and gives the old one to a friend, then the waste of the first person is the income of the second.