Nature journal has selected the most relevant scientific topics that could make a high impact in 2016. From an energetical point of view, the most significant one in the list is the capture and use of CO2, which was demonstrated only at very small scale until 2015.
(Climeworks plant in Zurich, image from www.climeworks.com)
The company Climeworks in Zurich is planing to capture around 75 tonnes of CO2 per month at its plant near Zurich by July and sell it to nearby greenhouses. On the other hand, Carbon Engineering in Calgary, has been capturing CO2 since October and expects to show that it can convert the gas into liquid fuel.
Here is the link to the publication.