TLDR: the study referenced is inherently flawed. Among others:

* It used outdated NEDC tests instead of WLTP numbers. (Diesel) car makers are known to have cheated NEDC tests for decades, using corrected WLTP numbers changes the whole story.

* It exaggerated the CO2 emissions for production of batteries, Tesla's Gigafactory emits 2.6x less CO2 per kWh than assumed.

* It assumed a battery lifespan of just 150k km. Tesla's rated battery lifespan is over 2M km, so taking 300k as very conservative number changes the calculation significantly.

* It assumed an energy mix of today, instead of an increasing share of renewable energy in the future.

Using corrected data, the Tesla emits actually 63% less CO2 instead of 11-28% more.