A recent study has found that eating broccoli can protect the lungs from damage.
Researchers have discovered that a substance sulforaphane in broccoli increases
the activity of a gene (NRF2) responsible to lung health.

When toxins build up in lungs, this gene is responsible for activating the mechanisms that remove these toxins. Smokers and people who have a pulmonary disease, cells in the lungs are insufficiently protected by this gene.
By eating broccoli, the activity of NRF2 increases, helping to remove toxins from lung. In addition to this, broccoli has many other health benefits. Broccoli has many basic nutrients such as vitamin C, A, Ca and fibers more than a well-known sources of these nutrients.
The same amount of broccoli has more vitamin C than orange and three
times more fiber than wheat bread. Broccoli also contains a number of potent
cancer-fighting substances such as sulforaphane and isothiocyanates.
These chemicals have been shown to stimulate the body's production of its own
cancer-fighting enzymes. If you don’t like broccoli, try broccoli sprouts. They
contain up to 100 times more of these chemicals.