The issue is being discussed.
Where is it being discussed?
Water will be recycled.
Crops have been grown in water.
Is the issue being discussed?
Have crops been grown in water?
When is it expected to rise?
How will it be recycled?
Is the population expected to rise?
Vertical farming is going to be discussed next week.
An expert in vertical farming will be invited to speak.
Who will be invited to speak?
The population is expected to rise.
Where was it developed?
What's going to be discussed next week?
How long have they been grown in water?
Who was vertical farming developed by?
Will water be recycled?
Vertical farming was developed by Despommier.
The idea was developed at Columbia.
Was the idea developed at Columbia?
