Is lung cancer hereditary? and if so how can i protect myself?

To a degree: Some we know, some not clear some genetic propensity 80% related to toxins from smoking.

Rare cases , yes: Most of the time , lung cancer is not hereditary , how ever 1.8% cases hereditary link is attributed , egfr ( epidermal growth factor receptor ) mutation is responsible. If some members of family has lung cancer , for early detection , extra efforts are needed ( not done in general population ) to screen by frequent chest x-rays, spiral ct scans. Don't smoke , have healthy habits to reduce incid.