Scientists are working on a method of recycling the CO2 from burning methane converting it back into methane in a continuous loop

Virginia Public Radio:

...
The goal is to achieve ‘artificial photosynthesis.’ And like the process of photosynthesis in plants, the gases in these methane power plants would be constantly recycled.

“So, we create a recyclable fuel stream. I think that would be a game changer.” But, she adds, “we also could change the way we make every day materials. I mean the plastic that’s on your phone; we could actually think about, how we make precursors to the polymers that are in these plastics. There’s a lot of places where this chemistry could potentially impact our daily lives.”
...
“We can’t necessarily say that our technology is going to be on the market in 10 years,” she says, "but we couldn’t say that about lithium batteries (at one point, either) and now they’re ubiquitous. And it’s really this fundamental research that the Department of Energy supports at universities that pushes our lives further.”

Morris presented her latest findings to DOE a few weeks ago and was told the results are impressive and that this is the first time a Nano molecular structure has shown promise for supporting artificial photosynthesis.
...

I like ideas that create efficiency in energy production and use.   If it works it will make more sense than current alternative energy options such as wind and solar.