Most major cities around the world continue to grow at a phenomenal rate due to the massive increase in population. This has led to a general decline in the quality of life in city areas as the environment becomes more crowded and polluted. Give some reasons why this growth has occurred and suggest some practical solutions to this problem.

The three diagrams above imply that

music

media develop continually. At a glance, we see some of

music

media were widely-used for a tiny period and became far less popular or diminished in the end

such

as Compact Disks,

Vinyl

Records and especially Cassettes. In 1990, the Compact

Disk

was used by the majority, but the Digital Audio took its place in 2010. The war between these two media has broken out since 2000; when the Digital Audio appeared for the

first

time. Due to technology explosion, Cassette no longer being demanded by 2000. The

Vinyl

Record totally disappeared by 2000 and sprang up again in 2010. To conclude, the Compact

Disk

popularity grew up by 40

percent

and

then

fell off steeply by 60

percent

.

Also

, there was an increase in Digital Audio use within 10 years. A sudden reappearance of

Vinyl

Record occurred after 20 years----between 1990 and 2010. The three diagrams above imply that

music

media develop continually. At a glance, we see some of

music

media were widely-used for a tiny period and became far less popular or diminished in the end

such

as Compact Disks,

Vinyl

Records and especially Cassettes. In 1990, the Compact

Disk

was used by the majority, but the Digital Audio took its place in 2010. The war between these two media has broken out since 2000; when the Digital Audio appeared for the

first

time. Due to technology explosion, Cassette no longer being demanded by 2000. The

Vinyl

Record totally disappeared by 2000 and sprang up again in 2010. To conclude, the Compact

Disk

popularity grew up by 40

percent

and

then

fell off steeply by 60

percent

.

Also

, there was an increase in Digital Audio use within 10 years. A sudden reappearance of

Vinyl

Record occurred after 20 years----between 1990 and 2010