This is somewhat true, though obviously misleading.
Since natural gas's energy efficiency is much higher than that of coal or oil, the amount of carbon dioxide released is the same for a greater amount of energy. Furthermore, it requires less carbon input to retrieve the natural gas.
Also, in order to use solar or especially wind, you need a form of electricity generation which can ramp up quickly when the wind dies. Until we get large-scale battery storage, that means natural gas turbines.
Since natural gas's energy efficiency is much higher than that of coal or oil, the amount of carbon dioxide released is the same for a greater amount of energy. Furthermore, it requires less carbon input to retrieve the natural gas.