Matching Pairs Carbon Dioxide and Climate ChangeOnline version From Carbon Dioxide with Climate Change terms. Match each term on the left with its correct description on the right. by Mr. Mundo 1 Ice Core Analysis 2 Parts Per Million (ppm) 3 Industrial Revolution 4 Preindustrial CO2 Levels 5 Fossil Fuels 6 Mauna Loa Observatory 7 Greenhouse Gas Energy sources like coal, oil, and natural gas that release CO2 when burned. CO2 concentrations before the 18th century, serving as a baseline for modern comparisons. Method for studying historical CO2 levels by examining air bubbles in glaciers. A location in Hawaii where atmospheric CO2 levels have been continuously measured since 1958. Gases, such as CO2, that trap heat in Earth's atmosphere, contributing to global warming. The measurement unit indicating the number of CO2 molecules per million molecules of dry air. A significant event in the 18th century that marked the start of a sharp rise in human-induced CO2 emissions.