This March 28, 2019 photo shows cigarette butts in an ashtray in New York. On Wednesday, Jan. 8, 2020, researchers reported the largest-ever decline in the U.S. cancer death rate, and they are crediting advances in the treatment of lung tumors. Most lung cancer cases are tied to smoking, and decades of declining smoking rates means lower rates of lung cancer diagnoses and deaths. (AP Photo/Jenny Kane, File)