My current green project part 2: rainwater harvesting system

Here is the 2nd part of my involvement in a major green project in the form of a mindmap presented to the participants of the project. The green technology here harvests and treats rainwater to a suitable quality for further use. Similar to the previous post, it touches on the design considerations for builidng a rainwater harvesting. (Click on the figure on look at the whole map.)
Fore more on rainwater harvesting information, refer to my previous posts here.