NOVELTY - Article comprises a first composition containing 1-1000 g of activated carbon, where the first composition is enclosed by a film to form a unit dose.    USE - The article is useful for: composting; and treating malodor in a composting appliance (all claimed).    ADVANTAGE - The article: is biodegradable; controls malodor resulting from in-home composting in a convenient, economical and environmentally friendly manner; and is substantially free of fillers.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a multi-compartment article comprising a first composition and a second composition, where: the first composition comprises 1-1000 g of activated carbon, the first composition is contained by a film to form a first compartment of the article, and the second composition is contained by the film to form a second compartment of the article;    (2) a malodor treatment regimen method comprising administering at least a first article comprising activated carbon and a second article comprising activated carbon into a composting appliance during the time period, where the time period comprises at least a first unit of time and a second unit of time, the first unit of time is not the same as the second unit of time, and the first article is administered after a first unit of time and the second article is administered after a second unit of time;    (3) treating malodor in a composting appliance comprising administering a tablet into the composting appliance, where the tablet is a compressed shaped body containing 1-1000 g of activated carbon;    (4) a product comprising a tub and many articles, where the tub comprises the articles, and each article comprises 1-1000 g activated carbon;    (5) a product comprising a flexible sealable bag and many articles, where the bag comprises many articles, and each of the articles comprises 1-1000 g activated carbon; and    (6) a starter kit comprising: a composting appliance; the article; and optionally instructions for administering the article to the composting appliance.