A Post-Script to the Last Entry:

If current trends hold, tobacco will kill a billion people this century, 10 times the toll it took in the 20th century, public health officials said Monday.

Tobacco accounts for one in five cancer deaths, or 1.4 million deaths worldwide each year, according to two new reference guides that chart global tobacco use and cancer. Lung cancer remains the major cancer among the 10.9 million new cases of cancer diagnosed each year, according to the Cancer Atlas.

Reducing tobacco use would have the greatest affect on global cancer rates, health officials said.