skyler skyler
  • 14-03-2014
  • Health
contestada

Why are cancer-causing factors in lifestyle or the environment difficult to identify?

Respuesta :

Аноним Аноним
  • 14-03-2014
1. over exposure to UV rays and other types of radiations
2. contact with certain chemicals
3. contact with toxic substances
4. consuming of alcohol and nicotin containing substances
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