Vietnamese government is planning to ban all motorbikes in cities across the country. This plan has brought about lots of controversy. People who are in favor of this plan said that this would reduce traffic jam and air pollution. However opposition said this plan couldn't be implemented because of bad public transport system in Vietnam klingt das natürlich?

The Vietnamese government is planning to ban all motorcycles in cities across the country. This plan has brought about a lot of controversy. People who are in favor of it say that it would reduce traffic congestion and air pollution. However, the opposition says that it could not be implemented because of the bad public transport system in Vietnam.

(The changes I made to vocabulary are because it seems that you want to write formally. If you're writing informally, you may keep the words that you used, such as "motorbikes" and "traffic jams".)