The romans helped the persian empire.
I would say that these terms illustrate that directions and words like "middle" are relative. For the Europeans China was far east from their point of view, but for China it was in the middle of what was relevant for them. It also shows that each place considers its own place as the center of their world: every other place will be seen through its relation with it.
Passenger numbers are
expected to double over the next
two decades, and carbon emissions
from aviation will rise along with
them.
1.) In order to comply with global
climate policy and accommodate
passenger forecasts, the aviation
industry agreed to drastically
reduce emissions. 2.)Meaning that the airplanes need to advance greatly to make things better for climate change and other things.
3.)With improved airport design and
ground-control operations, airports
can reduce CO2 emissions.