In the run-up to international climate change talks in Paris, and with pressure from the Pope to help “smoke out” Congress on “climate change denial,” the press celebrates a study purporting to show 3 million premature deaths per year globally from air pollution.
The most important component of pollution is said to be small particulates—smoke and dust, along with ozone. Cutting CO2 emissions would incidentally cut down on these particulates (PM2.5s) and allegedly postpone 3 million deaths from stroke, heart attack, chronic obstructive lung disease, acute lower respiratory infection, and lung cancer. The study was published in the Sep 17 issue of the prestigious British journal Nature.
Complicated mathematical models are used to extrapolate conclusions from small epidemiologic studies to the entire globe, notes Physicians for Civil Defense. They assume that all particles are equally deadly, no matter their composition, and that tiny exposures over time can be as bad as or worse than a big exposure all at once. They ignore other possible explanations for different rates of diseases in different locations. Continue reading “Dust Does Not Cause 3 Million Strokes, Heart Attacks, or Other Deaths a Year, States PCD”