dirtying

noun dirtying

• pollution — the act of polluting or the state of being polluted.
• contamination — the act or process of contaminating or the state of being contaminated
• rottenness — decomposing or decaying; putrid; tainted, foul, or bad-smelling.
• spoliation — the act or an instance of plundering or despoiling.
• greenhouse effect — an atmospheric heating phenomenon, caused by short-wave solar radiation being readily transmitted inward through the earth's atmosphere but longer-wavelength heat radiation less readily transmitted outward, owing to its absorption by atmospheric carbon dioxide, water vapor, methane, and other gases; thus, the rising level of carbon dioxide is viewed with concern.