Louisiana - Spanning nearly 1 million acres, south-central Louisiana's Atchafalaya Basin is the nation's largest river swamp. A distributary of the Mississippi River, the swamp begins near Simmesport and stretches 140 miles south to the Gulf of Mexico.
I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it.
Answer:
We should limit the use of carbon dioxide,such as making more electric cars,and limit greenhouse gasses.
We would be looking for a rather small country with a relatively population. It would also probably not include land that is relatively uninhabitable: mountains or jungle or deserts.
The correct answer is: Ecuador. Its population is 16 million and the population density is 55 people per square kilometer.
