I think in general it's a very good article and I like the summary in the end how the different interventions can also have trade offs. The only thing I would

I think in general it's a very good article and I like the summary in the end how the different interventions can also have trade offs. The only thing I would disagree with is the recommendation of the uHoo monitor. There are many people not happy with the accuracy and AQSpec, a US EPA test center, also tested the unit with pretty bad results. See http://www.aqmd.gov/docs/default-source/aq-spec/field-evaluations/uhoo---field-evaluation.pdf?sfvrsn=12 http://www.aqmd.gov/docs/default-source/aq-spec/field-evalua...