You can survive with just one lung as long as your other lung is still functioning properly.
Your lungs are responsible for exchanging carbon dioxide and oxygen through your body and the environment.
And when one lung is removed, the remaining lung will compensate by increasing it's size and efficiency.
And over time your body adapts to the loss of one lung and can also maintain adequate levels.
You can live a full life with one lung as many people do.
Although your overall health after you have one lung removed will depend on why the lung was removed.
If your lung was removed due to cancer or another illness then there is also a risk of the condition returning.
If you had one lung removed after a trauma, then as long as you remain health, your other lung should have no issues and place no limitation on your life.
The remaining lung in the body will expand and fill the space and take on the workload of both lungs and many people with one lung do lead full and even active lives.
Some people though with one lung may experience shortness of breath and fatigue or other respiratory issues.
A PFT test or pulmonary function test can help to determine if you can live with one lung by measuring your lung capacity.
And after the lung surgery, the recovery can take several weeks to months and can also cause some soreness and fatigue.