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_pop = df_pop[~df_pop['Country_Region'].isna()]
df_pop.drop(['quarantine', 'schools', 'restrictions'], axis=1, inplace=True)
df_pop.isna().sum()