Maybe within 15 years , but for now worldwide use of fossil fuels is on the rise .
Yet use of fossil fuels are on the rise throughout the world .
Of course they are. They are the easiest fuels to use as nations industrialize, and currently most of the world's nations are not fully industrialized. You may have noticed that nations with the cleanest air have been industrialized the longest and nations that are newly industrialized generally have high levels of air pollution. However, this does not last forever. Eventually industrialization reaches a level where nations can look for cleaner sources of energy.
Predicted use of fossils fuels is expected to increase at least until 2040, and probably beyond that, however, green energy use is also expected to increase and it may actually increase faster than expected given continued improvement in green technology. Germany is a case in point in that it is a nation that went from only 6% green energy use in 2000 to 40% by 2016. Green energy simply has too many advantages for it not to be used on an increasing scale.