The U.S tax system is set up on both a federal and a state level.
Ocean warming provides a good example of a potential positive feedback mechanism.
"<span>When housing prices fall, consumers are more likely to </span>default<span> on their home loans, causing banks to lose money. Also, home equity dries up, meaning that consumers have fewer funds available for spending, saving, investing or paying down their debts. Sometimes, banks are even forced to shut down."</span><span>
Read more: How does a decline in housing prices affect the banking sector? | Investopedia http://www.investopedia.com/ask/answers/032315/how-does-decline-housing-prices-affect-banking-sector...
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<span>Society plays a monumental role in moral ideas and in free-thinking regarding moral matters. Because we all live and work in different societal environments ad we are influenced by these environments, it is up to us as individuals to determine what we consider to be morally right or morally wrong. As much as we believe we have the freedom to think for ourselves, society heavily influences on our thoughts, because our opinions are formed from and influenced by other people and the information they give us. We decide what we believe is morally right or wrong, but society guides our opinions.</span>