Can paper be used for schach?
Paper comes from wood, which grows from the ground. Also, paper seems like peshutei kli etz - a wooden vessel without a receptacle, which does not accept tum'ah. So it seems like paper should be valid.
On the other hand, I've never seen it actually used in a sukkah. Is it just a practicality issue (it's hard to avoid the wind blowing the paper away), or is it actually invalid?
(Question originally by my brother.)