Researchers at Stanford University have published a feasibility study to convert 143 countries world-wide to 100% zero-carbon energy by 2050 using wind, solar, water (WWS) storage systems. They say it could be done by 2030 but for a variety of reasons have chosen the later date. They estimate such a system would cost $73 trillion to implement, but would recoup the entire cost in 7 years. According to the Stanford researchers, building the new WWS system would incur a carbon emission footprint less than 1% of the current energy system. It would create millions of jobs and save many of the 7 million lives lost yearly to pollution.
However, they devote little attention to funding sources, implementation mechanisms, or ways to overcome political and corporate resistance to their ambitious plan. They do provide a country by country breakdown of how it could be achieved.