I would choose microalgae, particularly Chlorella vulgaris, to address local environmental issues such as nutrient-rich wastewater and heavy metal contamination. I lean toward algae because they combine bioremediation with ecological restoration. Chlorella efficiently absorbs nitrates, phosphates, and heavy metals like cadmium and lead while performing photosynthesis, thereby reducing eutrophication and improving water quality. Unlike bacteria, algae also produce oxygen, which supports aerobic microorganisms and overall ecosystem health. Additionally, algal biomass generated during remediation can be harvested and reused for biofertilizers or biofuel production, making the process sustainable and economically attractive. This dual role of pollution removal and resource recovery makes microalgae a compelling alternative for environmental cleanup.