Proclamation - Fair Housing Month 2017. The Washington County Board of Commissioners proclaims April 2017 as Fair Housing Month. Join CPO 4M at their April meeting. 7 p.m., Wednesday, April 26 / Funding for local police services in the Metzger area are on the ballot this May. Find out the details from your Sheriff's Office. Plus, get an update on services and projects from Tualatin Valley Water District. View this news article.
Carbon black (Color Index International, PBK-7) is the name of a common black pigment, traditionally produced from charring organic materials such as wood or bone. It appears black because it reflects very little light in the visible part of the spectrum, with an albedo near zero.
Black carbon is very distinct from other particles. Major sources of black carbon are known; magnitudes are uncertain but bounded. For a continental picture, valuable emission inventories for metropolitan areas must be combined with country-wide emission estimates.