The u. s. weather bureau has a station on mauna loa in hawaii that has measured carbon dioxide levels since 1959. at that time, there were 311 parts per million of carbon dioxide in the atmosphere. in 2005, the figure was 375 parts per million. find the increase in carbon dioxide levels and the percent of increase. round to the nearest tenth of a percent.

here were 328 parts per million of carbon dioxide in the atmosphere in 1959.

there are 414 parts per million of carbon dioxide in the atmosphere in 2017.

the increase is 414 - 328 = 86 parts per million.

the ratio of the increase to the amount in 1959 is 86 / 328 = .262.

the percent increase is 100 times that and is equal to 26.2%.

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