"studies have shown" proceeds not to mention anything specific....

"studies have shown" proceeds not to mention anything specific. Righto mate, the sentences sound thought out but afraid incorrect.

here I asked chatGPT for you, saves me typing.

Producing electric vehicles (EVs) typically results in higher emissions of CO2 than producing conventional gasoline or diesel vehicles. However, when considering the entire lifecycle of a vehicle, including fuel production and use, EVs tend to have significantly lower emissions of greenhouse gases than conventional vehicles.

The higher emissions associated with the production of EVs are primarily due to the manufacturing of the battery. The production of lithium-ion batteries requires significant amounts of energy, which is often generated by burning fossil fuels. Additionally, the extraction and processing of materials used in batteries, such as lithium and cobalt, can also generate significant greenhouse gas emissions.However, the emissions associated with battery production are offset by the fact that EVs produce no emissions when driven. In contrast, gasoline and diesel vehicles emit significant amounts of CO2 and other pollutants during their operation.

When considering the entire lifecycle of a vehicle, including fuel production and use, studies have shown that EVs produce significantly lower emissions of greenhouse gases than conventional vehicles.Furthermore, as the electricity grid becomes increasingly powered by renewable energy sources such as wind and solar, the emissions associated with EV production will decrease even further.

Therefore, it is important to consider the entire lifecycle of a vehicle when evaluating its environmental impact, rather than just the emissions associated with its production.