What happens if a lung is taken?

Pneumonectomy. A person can live with only 1 lung if the lung that remains is healthy enough to supply the oxygen needs of the person's body. The first reported pneumonectomy was performed in 1895, and it was done in stages, by a scottish surgeon, dr. William macewen for TB and emphysema. The first one done all at one time was done in 1933. http://en.wikipedia.org/wiki/pneumonectomy . Often only part is removed.