You witness a child collapse and identify the need for cpr. how long should you perform cpr before activating ems?

Hi!  On an individual basis, to reduce air pollution stop using fossil fuels on a daily basis in his car (so switching from a fuel car to an electric car or at least a hybrid car would be a lot already). Another thing would be that important to do would be to stop spending resources such as wood for warming but to rather use a different energy source to heat up an apartment.
Generally when there is high air pollution, different infections of the nasal pathway could ensue due to it.  Hope this helps! :-)