Summarizing graphs from the text

To the students who are not taking Professor Cooper’s English class based on climate change, I am Sanjida and I am writing this blog summarizing two graphs from the book climate change by William Nordhaus. On chapter four page 39, there’s this graph which is an observatory made by some scientists from the year 1958 in Hawaii; showing us on the graph how carbon dioxide concentrations rise 25% from 1958-2012. On the graph the X-axis refers to the numbers of years and the Y-axis refers to carbon dioxide concentrations (parts per million). Again in chapter four page 46, there’s another graph which is showing us the trend of global temperature done by three research groups; on the X-axis it refers to the number of years and the Y-axis shows temperature change from 1900 in Celsius.