Because air space is limited, there's an inclination to believe that airlines are natural monopolies or oligopolies and that flooding the market with competitors will actually make air travel less, not more, efficient.
Some believe increasing the number of competitors might make air travel less efficient.
Air space is unlimited so it is widely believed that more competitors will make air travel more efficient.
Some stations in the area will accept it.
I don't think you have enough time to finish it.
There is a large group of people talking.
It is beyond me.
He had a boyfriend named Julia.
A person is excited about receiving a gift.