miya kabajani and american scientist christine grummon collect climate data here for noaa, the united states' national oceanic and atmospheric administration. >> they have these monitoring sites all over the world, and the namib desert is a site where their sampling is done for carbon dioxide. >> the air sample from this high pole is stored in these bottles and sent back to noaa in colorado for analysis. the data is used by scientists like francois engelbrecht of south africa's center for scientific and industrial research to track and model the effects of rising greenhouse gas emissions. the data shows the global temperature has increased by about one degree celsius in the last century. >> now, what is natural for the planet? when the planet moves from an ice ace into a warmer phase, then temperature tends to increase globally at a rate of about one degree celsius every thousand years, perhaps 2,000 years. so what we are looking at here is an increase in the global temperature that is taking place at a rate that is about 10 times faster than any natural process. >> to understand the