Which of the following is NOT an example of water pollution?

Wetlands restoration is indeed not an example of water pollution. This practice involves the rehabilitation and restoration of wetland ecosystems, which can improve water quality, enhance biodiversity, and provide natural filtration systems. Wetlands act as buffers by absorbing pollutants and reducing their entry into larger water bodies, thereby promoting a healthier environment.

In contrast, oil spills, fracking, and tank leaks all involve the release of harmful substances into the water, leading to contamination and degradation of water quality. Water pollution is characterized by the introduction of pollutants that adversely affect aquatic life and human health, which is not the case with wetlands restoration. This distinction helps clarify the broader implications of water management practices versus those that contribute to pollution.