Tutte le piante respirano, assumono ossigeno ed emettono anidride carbonica quando il sole non splende. Quando il sole splende, fotosintetizzano nello stesso momento in cui respirano.

Yes, this is about the fastest growing plant on earth,

and while been seen as beautiful and it has many uses,

it is also known to block waterways, and kill other species and fish, partly by limiting sunshine in the water and scavenge all the oxygen.

an interesting read:

Water Hyacinth Control

Eichhornia crassipes - Wikipedia