Our DNA is over 99% identical, but why would only 38% of us get cancer?

our genes some genes are more prone to cancer then others

(I'm pretty sure)

Cancer occurs during mitosis as a result of a mutation in the genes. The thing is, not everyone's genes mutate the same way therefore not everyone will have cancer. Also, mutations are completely random and one mutation will not be enough to cause cancer. This is why although our DNA is identical, not everyone has cancer or has the same type of cancer.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.