Every year, cleanup operations are conducted to collect green algae before they decompose. Local authorities, such as those in Saint-Brieuc Bay, use mechanical equipment to remove stranded algae.
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In 2021, approximately 50,000 tons of algae were collected along Brittany's coasts, according to the regional prefecture of Brittany. These collections help limit health hazards, but they are expensive, costing up to 1.5 million annually for some municipalities.
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These operations address symptoms rather than root causes.
Storage and treatment of collected algae remains challenging.
3. Farmer Awareness and Education
Campaigns have been launched to train farmers in more sustainable practices. For instances:
Nitrogen Balances: Farmers are taught to calculate crop needs to limit unnecessary fertilizer use.
Sustainable Agriculture Contracts (CADs): Funded by European aid, these contracts encourage crop rotation, organic farming, and the use of cover crops.
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Approximately 30% of Brittany's farms have adopted agroecological practices, according to a report by the Brittany Chamber of Agriculture (2020). These farms have reduced nitrate leaks by 15% to 30% while maintaining competitive yields.
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