Final answer:
Logging is a way that humans have impacted the rainforests, but not the tundra.
Step-by-step explanation:
Logging is a way that humans have impacted the rainforests, but not the tundra. Logging involves cutting down trees in the forest for various purposes, such as timber extraction. This activity leads to deforestation and habitat destruction in the rainforests. In contrast, tundra ecosystems are not typically subjected to logging due to their harsh and fragile nature.