Lower by up to a factor of 10 than coal-fired emissions. This is due to the chemical content of the fuel, the efficiency of the turbine, and the nearly-universal presence of advanced NOx controls. The amounts tend to be low and relatively removed from population centers. CO breaks down rapidly. In addition, some VOCs, like benzene, are toxins.
Power plants emit essentially no VOCs.
The major anthropogenic sources of this class of chemicals are motor vehicles and industrial processes.