Replying to Think about this! Energy Transfers

All energy transfers are inefficient, and some energy is inevitably lost as heat. Any kind of transfer from gasoline being burned to fuel your car or proteins breaking down macromolecules in your stomach to fuel your body, some of the energy released from any of those reactions will not be captured for the work it is intended, but it will escape as heat. This explains why the hood of your car is hot after being driven and why we all have a body heat of 98.6*F. Once that energy is converted to heat energy, it cannot be changed back to any kind of energy useful to us (at least as far as our current technology will allow us). This heat energy simply escapes off into space. SO, if all energy transfers inevitable lose some energy as heat energy that cannot be converted back to usable energy, will we eventually run out of energy? And since the foundation of life itself is all reliant of energy, will all living things on this planet cease to exist as a result (assuming nothing else catastrophic occurs before that point)?

My opinion is yes.
Discuss.