as humans we are changing from desile engine to electirc vechiles for enironment reasons but the battrey used is by lithium doesn't it cause pollution

Yes, you're correct that the production of lithium-ion batteries, which are commonly used in electric vehicles, does have an environmental impact. Here's a step-by-step breakdown:

1. Mining: The extraction of lithium involves the mining of lithium-containing minerals or the evaporation of water from lithium-rich brine pools. Both processes can have a significant environmental impact, including water pollution and depletion, soil damage, and air pollution.

2. Manufacturing: The process of manufacturing lithium-ion batteries also requires a significant amount of energy, which can contribute to greenhouse gas emissions if the energy is not sourced from renewable resources.

3. Disposal: At the end of their life, if not properly recycled, lithium-ion batteries can end up in landfill, potentially leading to soil and water contamination.

4. Recycling: While lithium-ion batteries can be recycled, the process is complex and costly. As a result, the recycling rates for these batteries are currently quite low.

However, it's important to note that despite these environmental impacts, electric vehicles are still generally considered to be more environmentally friendly than diesel engines. This is because electric vehicles produce zero tailpipe emissions, and the emissions associated with the production and disposal of batteries are offset by the emissions saved during the use of the vehicle. Furthermore, as technology advances and the use of renewable energy increases, the environmental impact of producing and recycling batteries is expected to decrease.