In biology, a terminal electron acceptor<span> is a compound that receives or accepts an </span>electron<span> during cellular respiration or photosynthesis. All organisms obtain energy by </span>transferring electrons<span> from an </span>electron<span> donor to an </span><span>electron acceptor</span>
Carbon dioxide is produced by the burning of fossil fuels. Carbon dioxide is produced by man-made machines. Carbon dioxide is produced by animal agriculture. Hope this helped or helped you get the right idea :p