Fetch CO2 emission information (#3182)
Fetch CO2 emission information (#3182)

* Fetch CO2 emission information

* fix blank lines

* fix blank lines

* Add type hints for function return values

* Update co2_emission.py

* Update co2_emission.py

* Update co2_emission.py

Co-authored-by: Christian Clauss <585dd401264c1e46d17ebec1862e5d2a9b6a6c5d@me.com>
TheAlgorithms/Python