__ Footprint; Impression Left on the Environment
This page is the CodyCross answer for the clue below from Train Travel, Group 704, Puzzle 5 (Long Corridors).
Question is: __ Footprint; Impression Left on the Environment
and the answer is: CARBON
Word Meaning:
CARBON — (uncountable) The chemical element (symbol C) with an atomic number of 6. It can be found in pure form for example as graphite, a black, shiny and very soft material, or diamond, a colourless, transparent, crystalline solid and the hardest known material.
Definitions from Wiktionary.