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  2. Brown carbon - Wikipedia

    en.wikipedia.org/wiki/Brown_carbon

    In chemistry, brown carbon (C brown /BrC) is brown smoke released by the combustion of organic matter. It coexists with black carbon when released in the atmosphere. [1] Black carbon is primarily released by high-temperature combustion and brown carbon is emitted mainly by biomass combustion. These two are the two most important light absorbing ...

  3. Lignite - Wikipedia

    en.wikipedia.org/wiki/Lignite

    Lignite (derived from Latin lignum meaning 'wood'), often referred to as brown coal, [1] is a soft, brown, combustible sedimentary rock formed from naturally compressed peat.It has a carbon content around 25–35% [1] [2] and is considered the lowest rank of coal due to its relatively low heat content.

  4. Humus - Wikipedia

    en.wikipedia.org/wiki/Humus

    Humus has a characteristic black or dark brown color and is organic due to an accumulation of organic carbon. Soil scientists use the capital letters O, A, B, C, and E to identify the master soil horizons, and lowercase letters for distinctions of these horizons. Most soils have three major horizons: the surface horizon (A), the subsoil (B ...

  5. List of inorganic pigments - Wikipedia

    en.wikipedia.org/wiki/List_of_inorganic_pigments

    Carbon black (PBk7). Ivory black (PBk9). Vine black (PBk8). Lamp black (PBk6). Iron pigments. Mars black or Iron black (PBk11) (C.I. No.77499) Synthetic magnetite Fe 3 O 4. Manganese pigments. Manganese dioxide: blackish or brown in color, used since prehistoric times (MnO 2). Titanium pigments. Titanium black: Titanium(III) oxide (Ti 2 O 3).

  6. Composting in Winter: 10 Simple Tips for Keeping Your ... - AOL

    www.aol.com/lifestyle/composting-winter-10...

    2. Stockpile leaves and other carbon-rich items. Fallen sticks, twigs, and leaves are abundant in autumn, but they’re much harder to come by when a thick blanket of snow covers the ground. Fill ...

  7. Coal analysis - Wikipedia

    en.wikipedia.org/wiki/Coal_analysis

    Coal comes in four main types or ranks: lignite or brown coal, bituminous coal or black coal, anthracite and graphite.Each type of coal has a certain set of physical parameters which are mostly controlled by moisture, volatile content (in terms of aliphatic or aromatic hydrocarbons) and carbon content.

  8. 2024 Mazda Models to Add Brown-on-Brown Carbon Turbo ... - AOL

    www.aol.com/2024-mazda-models-add-brown...

    The Mazda 3, CX-5, and CX-30 all get this new version with black exterior trim, Zircon Sand exterior paint, and a Terracotta interior.

  9. Archaeologists Found 115,000-Year-Old Human Footprints Where ...

    www.aol.com/archaeologists-found-115-000-old...

    Like carbon dating, scientists use isotopes and context clues to calculate the approximate age of fossils. ... Bobbi Brown Shares Her Top Face-Transforming Makeup Tips for Women Over 50.