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.
When sunlight strikes black carbon, its dark hue causes it to heat up, something like the way a black tar roof gets hot on a sunny day. When black carbon falls on ice and snow, it smudges their bright white reflective surfaces. As a result, less sunlight bounces back out to space, leading to more warming.