

Not how reactors work, they are very much closed systems specifically to avoid this problem.
Think of it like and air conditioner or refrigerator. The the attempt that cool the inside by dumping heat outside uses a closed loop and the two mediums do not directly interact or mix, which is why your home isn’t full of pollen when running an air conditioner all day if your windows and doors all properly seal.
The comment you replying to was trying to not so subtly point out this is a business plot and little else. Nobody is going to pay a subscription fee to have a tree in front of their business, but they might cough up money for a third party to maintain a tank of algae out front if it was sold right