Do fossil fuels release carbon dioxide when burned?

Yes,

this is another way of making CO2, yet people should really stop using this as another resource for energy.

fossil fuels are another resource yet very expensive to obtain because of all the work, drilling and gas itself to get.

CO2 can also be turned back into OXYGEN through a process well known as PHOTOSYNTHESIS. this is the process when plants use sunlight to obtain energy, and "breath" in CO2 and "drink" water, and combine all of these to make two produces.

Glucose ((SUGAR))

O2 ((Oxygen))

and sometimes O3 ((OZONE))

most community's take hundreds of years to become stable