Yes, one of the symptoms of insufficient oxygen levels can be headache.
Carbon dioxide, CO2
Carbon form carbon dioxide by oxydation.
Monkeys give off carbon dioxide when they exhale - the same as humans do!
plants release carbon dioxide and we give out oxygen .
Yes we do, we absorb the oxygen and give out carbon dioxide
Plants give us oxygen we give them carbon dioxide.
No. Animal cells use Oxygen and give off carbon dioxide as a waste product. Plant cells use carbon dioxide and give off oxygen.
animal decaying would give off carbon dioxide
oxygen-carbon dioxide cycle
It gives off carbon dioxide which proves that it respires.
Yes, cars emit carbon dioxide when they are in operation.
carbon dioxide