Read the following paragraph from an essay discussing a ban on outdoor smoking:
Evidence is growing that outdoor smoking poses health risks to non-smokers from secondhand smoke, hot ash, and
buming cigarettes. Second hand smoke exposes nonsmokers to dangerous chemicals. Studies show that smoke plumes have
enough particles to endanger the health of people nearby, especially those with existing medical issues. Although smoke can
drift away quickly outside, smokers often gather together in places like outdoor cafes, near doorways, and at bus stops, parks,
and concerts. This can produce a lot of smoke in a small area. Besides the dangers of inhaling smoke, nonsmokers are at risk of
cigarette bums or getting ash in their eyes or on their clothing in crowded conditions, such as on busy sidewalks. These health
concerns have caused many cities and businesses to restrict smoking in crowded outdoor areas, but there are other reasons for
the bans as well.
What is the function of the sentence "Evidence is growing that outdoor smoking poses health risks to non-smokers from
secondhand smoke, hot ash, and buming cigarettes."
• Linking
O Evidence
O Analysis
O Main point