Secondary environmental problems are caused by human activities, which can be divided into two categories: environmental pollution and ecological destruction. Environmental pollution means that human beings directly or indirectly discharge substances or energy that exceed their self-purification capacity into the environment, which worsens the environmental quality and destroys the ecosystem and people's living environment, while ecological destruction is caused by the direct action of human activities on the natural environment.
According to the above definition, which of the following belongs to environmental pollution?
The uneven distribution of water resources in the region further exacerbates water tension