How can I ensure that my system is only using 9 litres of water per hour per linear meter?

You can purchase a flow control device from all good gardening centres and hardware stores that will help you do this, or contact your local irrigation specialist.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.