Final answer:
Humans cause weathering when constructing roads by clearing vegetation, road construction, and vehicle emissions.
Step-by-step explanation:
When constructing roads, humans cause weathering in several ways. One way is by clearing vegetation in order to build the roads. By removing the plants and their roots, the soil becomes exposed to the elements and is more susceptible to weathering. Additionally, road construction itself can lead to weathering as it involves digging up and disturbing the natural soil and rocks, which can accelerate their breakdown over time. Finally, the use of vehicle emissions from cars and other vehicles can contribute to the chemical weathering of rocks and soil.
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