The first time it was introduced in the film, it was slight, but still noticeable: after Asha scanned the ground, the machines' results were “abnormally high water content…no radioactivity”” (Pumzi 4:53). However, this problem became more evident when Asha crossed a desert-like river, classified as a "nuclear radioactive river" (Pumzi 14:01). This scene reflects the effects of chemical spills in the ocean. This also serves as a warning that radioactivity will be one of the major contributing factors to even more environmental problems. This ties into all of the other environmental issues shown throughout the film, while also being the reason for what happened during the Water War.