Positive feedback interactions in earth’s systems are always a result of human action. true of false?

It is false that positive feedback interaction in Earth's systems are always a result of human action. There are some interactions that humans cannot affect, but which are a result of natural events. Usually, when you see the word "always" in true/false questions, it is going to be false, because things rarely happen "always."

Answer erosion,oil spills,pollution,tourism,urban development;