Final answer:
Advances in technology have greatly increased the human impact on the environment through the exploitation and depletion of natural resources, leading to global climate change and habitat destruction.
Step-by-step explanation:
The event that has increased the impact of humans on the environment is Advances in technology. This includes the use of fossil fuels, which has led to global climate change, habitat destruction, and over-harvesting. Technology has enabled greater exploitation of natural resources, thereby increasing the human footprint on the environment. On the other hand, reduced human population growth would likely decrease the impact on the environment by slowing resource use and habitat disturbance. The use of tools for hunting, while significant in the past, is not as impactful as modern technological advancements.