If I understand you correctly he cleans 4 tons every 2 years well 4 is double 2 so in 4 years he would have cleaned up 8 tons. They are trying to trick you with the larger number it has nothing to do with that big number.
The world’s population is concentrated in certain countries like China most likely because of "<span>the country’s land mass, which is much larger." China is considered as one of the largest nation. They are historically a home of various people around the world. Because of the country's population concentration, they implemented 'one-child policy.'</span>
Answer: Renaissance
Explanation:
The Renaissance literally means “rebirth”. The Renaissance changed the world. You might even say it created all of what we now know as modern life.
Answer:
A network of cities served by a particular airline
Explanation: