It's AumSum Time.
What if Windows Disappeared?
No problem!!
I will replace all windows with doors.
Oh AumSum.
Firstly, windows help in air circulation.
If windows disappeared, people may not get
any fresh air inside their homes.
Secondly, windows allow sunlight and moonlight
to enter the house.
If windows disappeared, people may turn on
lights more often.
Electricity bills will increase.
Thirdly, if windows disappeared, claustrophobic
people.
i.e. people having fear of confined spaces
will be most adversely affected.
Fourthly, tourists pay exorbitant sums to
get a panoramic view from their hotel rooms.
If windows disappeared, profits of hotel industry
might plummet.
Fifthly, if windows disappeared.
Travelling in expensive cars or in business
class by airplanes will not be attractive anymore.
Sixthly, if windows disappeared, there will
not be any need for curtains anymore.
Curtain industry may completely shut down.
Lastly, if windows disappeared, selling a 
house will not be easy anymore.
