As the technology in our world increase, people will consume more and demand for sources will be more so the number of people increase, and this will increase the carbon emissions will increase in our world and we will need another earth to survive which is impossible. Japan was one of the countries that started treating this problem because they increased there energy use and decreased their oil consumption.

Most of emissions are from buildings and transportation, so as a result a new project was brought which is the building of Cool city. Cool city is an ideal and model city of technology and knowledge gathered from the SDCG expertise. This city will operate on natural energies, such as it will present solar ships, hybrid cars, light rail transit, and monorail as transportation. It will also meet the requirements of the residents and visitors by having a business, sport, resort zones and a Jatropha forests, last but not least it will contain power plant farms. This cities heat managing will be unique, where they will manage heat by water, planting trees, roof membrane and the usage of recycled cool air.

As a result the buildings will reduce carbon dioxide emissions by 60%, where the echo towers will reduce 50% and the echo residences will reduce carbon emissions to 30%. This is a great project to prove that technology can be used in solving problems, and maybe in the near future we will find a way to stop global warming.