Why do cities try to reduce their smog?
368682
choke, choke.  They do it for the health of their citizens.
178824
Because they want to b1tch about something.   Seriously, smoking outside isn't going to give anyone cancer any more than that car they drive.  It's getting completely out of hand.
635879
According to the government, because trying to enforce pollution caps doesn't work while researching new sources of energy will. And because it's bad for business.\n\nAccording to everyone else, because it's bad for business. Companies have to spend more money and cut back on their profits. So they don't want to do it. And they have enough power in the government to prevent the US from signing.
674316
smog, overcrowing, health, water treatment, waste management, second hand smoke, drugs.
237061
Hey! I resent that answer above! It's something you should be concerned about, basically all the fumes people are emitting into the atmosphere (from factories, cars, etc.) are getting trapped in our atmosphere and heating the entire planet! This really shifts the balance of everything, there are many animals that can't live in the new heat they're not used to! If this keeps up, the earth will be smeltering!
367578
because they give out carbondioxide
889233
Society uses many things to justify their problems. But Big City problems\nare problems of circumstance. Humans gather in cities for protection,\nbut after a while the get glutted. There are just too many people competing\nfor the same needs.\nI know it's easy to say. Many have lived there all their lives. But people need to\nstop going to the Big City for "excitement". And more people need to Move from the Big City, to smaller cities where life will be easier for them. Less\nexpensive. Easier to get around.
1098588
If it cut back on the amount of hot air released into the atmosphere then it could help.
17996
It is a number of people living in a small area of Manhattan.  Most other cities that are more spread out will clean the streets less frequently.\n\nIn Phoenix, Arizona, they pick up garbage once a week and sweep only once a week.  We are more spread out than Manhattan.\n\nIf NYC did not clean as often as it does, there would be a lot of garbage all over the street.
621812
if the air is polluted enough, yeah. I would get them sometimes when in rome...air pollution can be pretty bad there sometimes. still a great city though...
485323
Also to keep up public image so people aren't as willing to complain about the bad things they do or try to get the city to buy out the service.  It's more of a preventative strategy.
1128412
quite common for new commercial buildings to have some sky or roof gardens these days. It helps to bring down the building temperature and cut air con cost. And provide a place for smokers to get their dose of nicotine\n\nHotels like to have that too, to create the cosy effect.
240818
I am very concerned with the rash of natural disasters that are happening and can only really attribute them to global warming. Our planet has the ability to "rebuild" the ozone, but not quickly enough at the rate we are depleting it. I think as Americans and as a consumer nation, we need to get on the clue train about how much we are harming our world by car emmisions and we need to switch to a clean alternative. It's possible, but we fear change.
239301
Have less people drive. Instead they can get on the bus.\nDesign cars differently so that they don't emit so many exhaust fumes.\nThose are the only 2 ideas I can think of right now. Try typing in reducing the greenhouse effect. Good Luck
422577
Are you trying to get Yahoo users to do your homework? :)\n\nWell, the benefits of the car outweigh the harms. They're practical, beneficial and are essential for modern city life. On the down side, car emissions are the one of the greatest contibutors to the greenhouse effect, but cars are so immersed into our culture that it is impossible to get rid of them. we can only eliminate the waste they produce, not the car itself.
140128
the are trying to reduce wind drag
1117557
Absolutely!!! It would cut back on pollution and make traveling so much more efficient and hassel free.