Probably safe to say that Smith wonât have to go for the Bandana Bandit look when he shows up at one of Vonnâs World Cup events. Tiger Woods walks in the finish area of an alpine ski, womenâs World Cup super-G, in Cortina dâAmpezzo, Italy, Monday, Jan. 19, 2015.
Carbon dioxide is not a pollutant but a naturally occurring, beneficial trace gas in the atmosphere. For the past few million years, the Earth has existed in a state of relative carbon dioxide starvation compared with earlier periods.
Sulfur dioxide and nitric oxide (NO) are the primary air pollutants, and ozone is a secondary pollutant (though there are negligible direct emissions of the gas itself). Nitrogen dioxide (NO2) is both a primary and secondary air pollutant. Other important gaseous pollutants are: ammonia, carbon monoxide, volatile organic compounds (VOCs) and persistent organic pollutants (POPs) which we discuss below.