An antonym (a word with a different meaning) for the word fresh as it is used in this passage would be
old.
recently made.
cold.
happy.

atmospheres is the answer to your question.

explanation:

one of the central themes of edward abbey's work has been his staunch opposition to the glen canyon dam on the colorado river that created lake powell, destroying stunning scenery and wildlife habitat, endangering many rare species of fish and animals, and also irreparably destroying many important archaeological sites which provided information about the early inhabitants of the united states.