0217.py

# Create a figure and an axis
fig, ax = plt.subplots()
# Plot CO2 emissions with a blue line
ax.plot(climate_change['date'], climate_change['co2'], color='blue')

# Specify that we will be using a twin x axis
ax2 = ax.twinx()

ax2.plot(climate_change['date'], climate_change['relative_temp'], color='red')

# Change the color of ticks
ax.tick_params('y', colors='blue')     # 'y' because we want to change the y axis
ax2.tick_params('y', colors='red')

ax.set(title='CO2 emmissions and relative temperature by year',
      xlabel='Year') # Does not matter which one you pick, ax or ax2
plt.show();