Yes, it is quite challenging for the government to replace all petrol cars with electric ones. The main issue is the high cost of building the necessary infrastructure, like charging stations. Also, industries that depend on petrol vehicles might resist the change. Plus, people are often hesitant to switch because electric cars can be expensive and they worry about running out of power on long trips.

No, it might not be that difficult. The government can offer incentives to encourage people to buy electric cars. As technology improves, these cars are becoming more affordable. People are also more aware of the environmental benefits, which can increase public support. Plus, other countries have successfully made the switch, showing that it's possible.

It depends on various factors. For instance, a country's economic status and resources play a big role. Urban areas might find it easier to switch compared to rural areas. Government policies and how well they raise public awareness are also crucial. Plus, the availability of materials for making batteries can be a limiting factor.