When you travel west, is time increasing or decreasing (going forward or back)?

Decreasing because when you travel west you will lose time. hopes this helped :)

Which one is the underlined word?

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”