How do humans affect green algae?

Humans affect green algae primarily through pollution, nutrient runoff, and habitat alteration. Agricultural practices often lead to excess fertilizers entering waterways, causing algal blooms that can deplete oxygen and harm aquatic ecosystems. Urban development and industrial activities can also introduce toxins and disrupt natural habitats, further impacting green algae populations. Additionally, climate change may alter water temperatures and light availability, affecting their growth and distribution.