Nitrogen dioxide: a reddish-brown, highly poisonous gas, NO2, used as an intermediate in the manufacture of nitric and sulfuric acids, and as a nitrating and oxidizing agent; a major air pollutant from the exhaust of internal combustion engines that are not fitted with pollution control devices.
Sulfur dioxide: a colorless, nonflammable, water-soluble, suffocating gas, SO2, formed when sulfur burns: used chiefly in the manufacture of chemicals such as sulfuric acid, in preserving fruits and vegetables, and in bleaching, disinfecting, and fumigating.
Carbon monoxide: a colorless, odorless, poisonous gas, CO, that burns with a pale-blue flame, produced when carbon burns with insufficient air: used chiefly in organic synthesis, metallurgy, and in the preparation of metal carbonyls, as nickel carbonyl.
-Anemometer, Annual ring growth, Artificial reproduction, Awl-shaped leaves, Axis,
-Bole, Bracts, Broadleaf, Bud scale scars,
-Cambium layer, Conifer, Crown, Cuttings,
-Deciduous, Determinate growth, Drupe,
-Genus, Genera, Germinate, Graft,
-Habitat, Host, Hybrid,
-Increment bore, Indeterminate growth,
-Lateral roots, Leader, Legume, Lenticles,
-Natural reproduction, Naval stores,
-Phloem, Photosynthesis, Pith, Pole, Pome,
-Radial, Resin blisters, Regal,
-Samara, Sapling, Scion, Seedling, Sheath, Silviculture, Species, Springwood, Sprout, Stomata, Stratify, Sucker, Summerwood,
-Tap Root, Terminal Bud,