Real-world examples of policy formation help

i need one example of :

Real-world examples of policy formation in response to problems

here are some of students examples :

1- 

http://www.usgbc.org/articles/%E2%80%9Cfour-more-years%E2%80%9D-state-policymakers-rack-wins-green-building

This article was published in August 2014 and points out the promotion and successes of the LEED certification program as well as other green building practices within public policy.

2- 

http://www.neaq.org/conservation_and_research/climate_change/climate_change_policy.php#carbontax

There are a few different areas of policy changes in regards to climate change and global warming on this site. I think the legislature President Obama has been trying to work on with congress to put through a bill that works towards cutting carbon emissions in the future is a good example.

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