I recently went scuba diving in Borneo for a few weeks to experience the great weather and diverse wildlife (humble brag).
Whilst there, we stayed at a relatively cheap eco-resort and I started to investigate the impacts of recreational diving.
I assumed like most mass tourism, it would have substantial negative impacts on the environment.
To my surprise, I actually found that diving can* be positive for the ocean for the following reasons.
*Scuba diving without care can be incredibly damaging to the marine life including diesel fuel from boats, coral reef breakage and marine life disturbance.