Over the past few decades, the incidence of cancer has seen both increases and decreases depending on the type of cancer and the region. Notably, cancers such as lung cancer have generally seen a decrease in incidence in countries where smoking rates have declined. Conversely, cancers such as melanoma have increased, partly due to more UV exposure and better detection methods. Additionally, the aging population is contributing to higher cancer rates as age is a significant risk factor for most cancers.
