https://drive.google.com/open?id=1s2RdFn0XAImi6mHFg7jfxxwfyp99kfdR
Air Quality Prediction-Getting accuracy of -34%
Hey @neelanshgulati100, your file contains total 4 errors, I have made changes in the file itself and marked them as well.
Hope this resolved your doubt.
Plz mark the doubt as resolved in my doubts section. 
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