This is the 1794th most frequent Swedish word.
fossila
"Fossila" in English means "fossil."
Here, 'fossila' is used as an adjective describing 'bränslen' (fuels), indicating that the fuels are derived from fossils.
Fossila bränslen är en ändlig resurs.
Fossil fuels are a finite resource.
In this sentence, 'fossila' modifies the noun 'rester' (remains), showing that the remains are related to fossils.
Man kan hitta fossila rester i gamla berglager.
One can find fossil remains in ancient rock layers.
Here, 'fossila' is describing 'tekniken' (technology), referring to technology based on fossil-based processes.