Pouvez vous mettre ce texte au présent perfect svp " the causes of eutrophication are multiple and can give rise to situations of complex interaction between the nutrients concerned and phosphorus, nitrogen and sunshine or water temperatures all come mainly from wastewater "
" the causes of eutrophication have had multiple and can have given rise to situations of complex interaction between the nutrients have concerned and phosphorus, nitrogen and sunshine or water temperatures all have come mainly from wastewater "
