Social Sciences, asked by nbisht4099, 1 year ago

पहली बार कब पता चला कि धुम्रपान करने से फेफड़ों का कैंसर होता है?

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Answered by poonamkosli7

0

In 25 June , 1957 . Or may be in 1920

Answered by anamika221003

0

In 1959 we come to know that smoking is harmful to health.......

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