The pie chart below shows information about different types of pollutants entering in a particular area of ocean in 1997 and 2007

This

pie chart

analysts

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proportions of different types of contaminants

discharging

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discharged

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in a specific area of

ocean

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the ocean

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in 1997 and 2007.

It is clear that

in 1997, the amount of trash are in the majority and the proportion of air pollution was the lowest.

However

, in 2007, most of

pollutants

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the pollutants

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are oil

whereas

the minority was agricultural runoff. In 1997, trash is the most popular type of contaminant, at 42% but the figure

of

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trash dropped nearly threefold to 15% in 2007. Comparatively, there was only 15% of oil in

this

area in 1997

then

there was a significant increase in the percentage of oil,

at

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52% and become the largest amount of pollutant at the same time. The figure

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air pollution was only 3% and was the lowest rate in 1997.

Meanwhile

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the data about sewage and agricultural runoff are 15% and 25% respectively. In 2007, the percentage of air pollution rose more than five times,

at

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to

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15%.

By contrast

, both the figures

of

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agricultural runoff and sewage decreased to 10% or below.