Read the last sentence of the paragraph. It is clear that the author wants readers to OA.
think about the ways in which airplanes harm the environment.
Cruise ships might be a fun way to take a vacation, but
they do far too much damage to the environment. The
ships are harmful to marine life. Research suggests that
cruise ships produce more than three times the amount of
CO2 that airplanes do. Furthermore, cruise-ship
passengers do not spend enough time at a given
destination to learn about its culture. Thus, the
passengers do not promote local culture. The next time
you want to take a vacation, try taking a train or plane to
your destination instead.
ОВ.
compare the speeds of different modes of transportation,
Ос
learn about the impact of CO2 on cruise ship passengers.
OD
find an alternative to cruise ships when taking a vacation.