text_plain_output_1.png
import pandas as pd

df_env = pd.read_csv('/kaggle/input/global-environmental-factors/env.csv')
df_airpol = pd.read_csv('/kaggle/input/pm25-global-air-pollution/pm25-global-air-pollution-2017.csv')
df_pop = pd.read_csv('/kaggle/input/world-population-by-country-state/country_population.csv')

df_env.isna().sum()