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Legally allowed to exceed an annual mean of fifty micrograms per cubic meter of air that equates to fifty million ths of a gram. the other is nitrogen dioxide or n o two form from one nitrogen and two oxygen atoms all combustion processes give rise to nitrogen dioxide cars with diesel engines have far greater emissions of energy to than those that run off gasoline the legal limit here is an average mean of forty micrograms per cubic meter of air. the helmholtz center in munich believes fine particulate matter and n o two are closely intertwined the organization was involved in setting current ...

A gram. the other is nitrogen dioxide or n o two forms from one nitrogen and two oxygen atoms all combustion processes give rise to nitrogen dioxide cars with diesel engines have far greater emissions of n o two than those that run off gasoline the legal limit here is an average mean of forty micrograms per cubic meter of air. the helmholtz center in munich believes fine particulate matter and the two are closely intertwined the organization was involved in setting current permitted levels those were based on world health organization guidelines. institute of epidemiology director anetta paper...