cứu 
----- Nội dung dịch tự động từ ảnh -----
X. Fill each blank with a given word/phrase (there are two redundant words/phrases)
effects - bringing - as a result of - leading - are emitted - include
because - resulting - cause damage - vehicles - health - are used
There are quite a lot of factors (..1..) in air pollution, particularly in our modern time. The first source of pollutants comes
from urban settings including sulfur dioxide, nitrogen dioxide, and carbon monoxide. These (..2..) directly into the air
from fossil fuels such as fuel oil, gasoline, and natural gas that (..3..) in power plants, automobiles, residential heating
systems and other industrial processes. Other pollutants in the atmosphere (..4..) dust, smokes, fumes, and mists. They are
significant air pollutants because of their very harmful (..5..) on human health. Very small solid materials or liquid droplets in
the atmosphere are also very harmful (..6..) when we breathe in, these materials will (..7..) to our respiratory system. Carbon
monoxide is an odourless, invisible gas which is formed (..8..) incomplete combustion. It is the most abundant of
air pollutants. Gasoline-powered (..9..) are the main source, although residential heating systems and certain industrial
processes also emit significant amounts of this gas. Exposure to carbon monoxide can be harmful since it displaces oxygen
in the bloodstream, (..10..) to difficulty in breathing at high concentrations.