Oil, ____ and natural gas are ____. They are formed over ____ of years from the remains of dead animals and ____. They are ____ - this means they cannot be ____ as quickly as they are being used.

Fossil fuels

autors:

Līderu saraksts

Vizuālais stils

Iespējas

Pārslēgt veidni

Atjaunot automātiski saglabāto: ?