The US. Weather Bureau has a station on Mauna Loa in Hawaii that has measured carbon dioxide levels since 1959. At that time, there were 331 parts per million of carbon dioxide in the atmosphere. In 2005. the gure was 389 parts per million. Find the increase in carbon dioxide levels and the percent of increase. Round to the nearest tenth of a percent. Increase carbon dioxide levels: C] parts per million Percent increase: Elwin