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Fine Particulate Matter PM2.5 2003-2011 Average

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The Outdoor Air Quality - Fine Particulate Matter data available on CDC WONDER are geographically aggregated daily measures of fine particulate matter in the outdoor air, spanning the years 2003-2011. PM2.5 particles are air pollutants with an aerodynamic diameter less than 2.5 micrometers. Reported measures are the daily measure of fine particulate matter in micrograms per cubic meter (PM2.5) (µg/m³), the number of observations, minimum and maximum range value, and standard deviation. Data are available by place (combined 48 contiguous states plus the District of Columbia, region, division, state, county), time (year, month, day) and specified fine particulate matter (µg/m³)value. County-level and higher data are aggregated from 10 kilometer square spatial resolution grids.

https://wonder.cdc.gov/controller/datarequest/D73

Massachusetts highway exit numbers to change in October to reflect mileage-based denominations to meet federal mandate – masslive.com

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Massachusetts highway exit numbers to change in October to reflect mileage-based denominations to meet federal mandate – masslive.com

Amid constant changes in 2020 not even highway exit numbers are safe.

Massachusetts will begin to transition to mileage-based exit numbers in October, according to WCVB.

The change was announced last year as the state will drop its current sequential numbering in order to comply with a 2009 federal mandate.

Massachusetts, New Hampshire and Delaware are the only states that have yet to implement the change, and are at risk of losing federal funding if they do not comply.

Loss of housing

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Destruction of housing due to highway construction is alarming due to the serious housing shortage in the U.S. In the 3 year period between 1967 and 1970 total displacements were as follows: 146,950 families or individuals, 16,679 businesses and non-profit organizations, and 4,890 farms. (Helen Leavitt, Superhighway-Superhoax)