um. what?

A concept design for the 2016 Olympics by the Swiss architecture firm RAFAA, the waterfall aims to create a carbon-neutral Olympic event through the use of solar power by drawing seawater up pumps that will then be released at the top, and thus generate electricity. In an attempt to recreate Rio de Janeiro into a green city of the future, the solar waterfall plans to help reduce energy costs and focus the city's efforts on an environmental sustainability approach by recycling the use of natural resources. 

"After hosting the United Nation's Earth Summit in 1992, Rio de Janeiro will once again be the starting point for a global green movement and for a sustainable development of urban structures."

A majestic design. A humanitarian effort. 

But, looking at this design, it inextricably begs the question: how is a 300+ foot tower of water going to help this situation?