Which of the following are not madrid protocol guidelines for protecting antarctica?
limit the amount of endemic species allowed
protect historical sites and distinct ecosystems
limit the amount of chemicals that can be dumped
limit how food waste can be moved from ships

The right answer is limit the amount of endemic species allowed. The Madrid Protocol was a response to the attempt of protecting the environment in Antarctica. Via 6 annexes of rules it prohibits all resources exploration activities only allowing scientific research and touristic activity, under well defined categories, in the area.  

limit the amount of endemic species allowed  - False - This assumption makes no sense, because the endemic species does not follow a maximum number of species. All the efforts of the protocol is to maintain the ecosystem and its fauna and flora, as untouchable as possible.

protect historical sites and distinct ecosystems  - True - Under the Annex V the protocol designated areas of protection because of its outstanding environmental.

limit the amount of chemicals that can be dumped  - True - Under the Annex IV the protocol prohibits the discharge of chemicals and garbage in the  Antarctic treaty area.

limit how food waste can be moved from ships - True - Also under the Annex IV we have the rules of discharge of waste, sewage and ship retention capacity.

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the answer to your question is a because laws act as guidelines as to what is accepted in society. without it there would be conflicts between social groups and communities. it serves as a norm of conduct for citizens.