Lowering carbon emission rate on global scale is a very slow process. It requires thousands of hours of hard work and millions of people working on it. It also requires the right project idea to be executed. These ideas should be solutions of engineering nature and divided into smaller and more specific problems (e.g. idea that would reduce the need of using cars, like smarter street design, underground tunnels, electric cars, hyperloop, or system that would allow you to work from home...). One of those ideas might be building more self sustainable cities as it would paint the picture of how cities should be like. They would rely mostly on solar and wind power and they would reuse every drop of water that has ever passed through them. Building more self sustainable cities that look appealing would motivate more people to work on this problem.