The general view in the topic is that environmental factors are key contributors to cancer causes. Studies have shown that 80–90% of cancer cases are caused by environmental exposures to things like food, radiation, alcohol, and tobacco. Twin studies, like the one done by Lichtenstein et al., are crucial for distinguishing between environmental and inherited factors.They came to the conclusion that environmental factors are the main cause of cancer, accounting for at least 65 percent of the risk at widely distributed cancer spots, based on data from approximately ninety thousand Scandinavian twins.But genetic factors also matter a lot, especially when it comes to interactions between genes and environment. One example of this is the significant heritable component (42 percent) observed in prostate cancer. In order to comprehend and control genetic and environmental risk factors for cancer prevention and therapy, comprehensive molecular epidemiology research is necessary, according to the study's conclusions. By integrating these knowledge, cancer prevention strategies may become more successful. 

Ancer -N Ature, C., & Urture, N. (n.d.). 343, 135. https://core.ac.uk/download/pdf/15053172.pdf