Why is it difficult for all of the countries of the world to agree on how to solve
environmental problems?
there is a split about the levels of responsibility and equality between rich and
poor nations
some nations are more supportive of the precautionary principle than others
there are often not consequences for nations that do not follow through with
international agreements
all of these

the answer is all of these

Explanation:

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to answer this question you need to explain more

he risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: