Does the gas turbine include externalities of fabricating, assembling, shipping installing, maintaining, and decommissioning oil drilling rigs? And of shipping, storing, and burning the gas? And the climate change caused by gas leaks? And the harms to humans, the fishing industry, and bird losses and whale harms by oil spills (I know you really care about those)?
I really want to know how in the hell whales are getting stuck in wind turbine blades. I want to see a video of this happening.
There's also the externality of paying for the natural gas, which is passed on to the consumer in the form of higher energy bills.
It probably also makes sense to include the $800M we are burning per day right now on patriot missiles (assuming the stockpile hasn't been depleted yet).