With the growing awareness that global atmospheric change may well have far reaching implications for life on Earth, the study of atmospheric chemistry is rapidly intensifying. Essential to understanding the changing atmosphere are global measurements of several key components, for example carbon dioxide, methane, and ozone. As part of a large international effort, the World Meteorological Organization is organizing the Global Atmospheric Watch, a network of more than 300 regional monitoring stations scattered across the globe. There are also several stations that can sample air that is representative of large, unpolluted areas (see Figure 1), and this part of the network is being extended. Six new stations are being added in Algeria, Argentina, Brazil, China, Indonesia, and Kenya, nations that until now have been minimally involved in studying atmospheric chemistry.