Is impact of organisms constructive or destructive?

Answer 1

Science is a tool that can be used for both constructive or destructive ends. The entire modern world with its many luxuries and technologies is built completely on science, but science also gave rise to firearms, explosives, tanks, artillery, chemical gas, biological weapons, and nuclear bombs.
It is often argued that science is neutral - neither constructive nor destructive. It is technology or the application of science that can be one or the other. In some cases, an application that is constructive in one context can be destructive in another. Think of harnessed electricity that powers this PC or can be used to end your life.

Answer 2

Geologically it is constructive.

Economically it is often destructive.

Answer 3

It is deconstructive