Three Key Economics Ideas and Externalities. Description Everyone is affected by externalities. Being able to properly identify an externality as positive or negative can give you an advantage in terms of managing or responding to it, whether as an individual or as a business. Where does the Three Key Economic Ideas come into play with this scenario. For this assignment, you will participate in a discussion about how externalities affect market outcomes. When responding to the discussion questions, be sure to reference course materials to support your conclusions and opinions. You should do the same whenever you respond to another person Solution 1. pollution from nuclear plats is very high which is most harmful to the environment. the radiation which comes from the nuclear power generation is most harmful to our climate, which we cant bare for a long period. 2. automobile exahust fumes create sound pollution and make much noise 3. coal power plants releases much CO2, corbon dioxide which cause environment defect and it is one of the cause to distruption of the OZONE LAYER 4. Chaildhood vaccines create better health to chaild but at the cost of environment 5. public education is most acceptable and expected one from one government. Providing education to all is the responsibility of governments, but due to some constraints governments are avoiding this area. 6. public libraries are helpful to the public, which drives the people to get knowledge at cheaper cost 7. one should feel the responsibility to minimize the negitive externality, untill unless one should feel it, it wont avoid and we may face problems .