A letter in the European Parliament warns about the potential concentration of power among South American agricultural firms due to the EU-Mercosur Trade Agreement's quota system. The agreement, set to take effect on May 1, could allow large Brazilian companies to dominate access to quotas, raising concerns among European farmers about unfair competition. The letter, initiated by MEP Benoît Cassart, calls for the exclusion of beef and poultry from the quota system and suggests a review clause to reassess the situation based on market concentration.