Mainly acid rain ... but a nice volcanic explosion can produce both acids and bases of significant strength.
And just plane oxidation will change things.
the causes of weathering are water, wind, and ice. -your welcome.
WEATHERING and EROSION
physical weathering
what chemical weathering called oxidation causes
Chemical weathering
Chemical weathering
Chemical weathering
Glaciers
weathering
The three main causes of weathering are physical weathering (e.g. wind, water, and ice), chemical weathering (e.g. oxidation and hydrolysis), and biological weathering (e.g. plant roots and burrowing animals). These processes break down rocks and minerals into smaller particles over time.
Wind and water are the major causes of weathering and erosion.
Oxygen is the major gas that is the cause chemical weathering.