The Wall

The term public good is often used to refer to goods that are non-excludable as well as non-rival. This means that consumption of the good by one individual does not reduce the amount of the good available for consumption by others. Also it is not possible to exclude individuals from the good's consumption. Fresh air water, nature may be considered a public good as it is not generally possible to prevent people from using it.

“Where the mind is without fear and the head is held high,

Where knowledge is free and the mind is led forward by thee

Ouch, Humph. An unseen force seemed to have gripped her left side. The pain had returned and this time with even more severity. It left her sweaty and with a tingling sensation all over her body. Groping blindly for a support and finding the guardrail she made her way down. This was just one of the many seizures that she had been experiencing since the past 3 weeks. She had been to numerous doctors, done all kinds of blood tests; she had even gone through the humiliating process of urinating in a bottle. But none could find what was wrong with her.