'Pollution' originates from Latin, specifically the word 'pollutio,' where 'polluere' meant 'to defile.' 'Intensive' comes from Latin 'intensivus,' meaning 'stretched or strained.'

'Pollution' changed from the Old French word 'pollucion' and eventually became the modern English word 'pollution.' 'Intensive' evolved from the Middle English 'intensif.'

Initially, 'pollution' meant 'defilement or desecration,' but over time it evolved into its current meaning of 'environmental contamination.'