Http://www.climatecentral.org/library/faqs/plants_need_co2_to_live_so_isnt_more_of_it_a_good_thing
Me being born because LOL
I'm pretty sure u can. Hope this helps!
I think those muscled in your neck is moving and where your bone is like that lump it is moving ,but you have to be careful not to not your head to hard or you might hurt a ligiment or muscle and it will go out of place