Yes, these are Fuel and Material.

Fuel - used to meet the power needs of your cities

Material Resources - required to produce resource-dependent units.

Manage the Power in your city to make late-game buildings more effective and trade Material Resources and Fuel with other civilizations.

Take note that your choices about resource usage will also have direct effects on the world's temperature, and can cause rising sea levels. Some coastal tiles will be at risk of becoming flooded or completely submerged. When settling cities, consider the risk of these coastal lowland tiles, but keep in mind that in the Atomic Era, Flood Barriers can be used to protect these tiles.

Burning Fuel heats up the atmosphere, leading to melted ice caps and rising sea levels and your Settler will now tell you if you are building a city near a coast.