<span>efforts to isolate and treat one member of a family, without the other family members, are doomed.</span>
L-dopa is effective against Parkinson's, but its enantiomer D-dopa is not. An enantiomers drug may not be equally effective. The enantiomer, in chemistry, is one of two stereoisomers that are mirror images of each other that are non-superposable, much as one's left and right hands are the same except for being reversed along one axis. It is also known as an optical isomer.
The tragedy of the commons occurs where property rights are lacking.
In economics, the tragedy of the commons is the situation in which individual users, who have free access to resources, are not bound by shared social structures or rules. officially govern access and use, acting independently in their own interest and contrary to general principles. common interests of all users, causing resource depletion due to their uncoordinated actions.
The concept originated in an essay written in 1833 by the British economist William Forster Lloyd, who used a hypothetical example of the impact of unregulated grazing on the region. common land in Great Britain and Ireland.
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