$322 BILLION: By 2030, China plans to round up 42 million people from a nine-city region into one giant megacity in the Pearl River Delta. The population is expected to hit 80 million by the time construction ends.
Answer:
I'd say the Great Wall of china
Step-by-step explanation:
built over 2300 years ago, it's over 20,000 miles long!
5.6m questions
7.3m answers