Moving content

[mayalapp]

• #66 Move create the americas 2007 gapminder dataframe before starting with co2 data
• Move if_else section to directly after finishing data cleaning
• Second method of reassigning column names
• left/right/outer/full joins
• finding the year closest to 2007 (just told them it was 2005)
• Calculate percent co2 emissions
• Maybe delete "putting it all together"? not sure what that's for summarize functions to demonstrate summarize with multiple columns)
• Data cleaning to facilitate join (too complex - keep content but not as exercise - I walked them through this process)