Although many inventions have helped us and made our lives easier they have also caused some problems. With the invention of the car came problems such as air pollution. Cities are becoming more and more congested with people using their cars even for short distances. The government is trying to make this better by making cars pass an emmission control test. Another problem with cars is that hundreds of people die or get seriously injured each year. Another technical invention that maybe we would have been better without is weapons. Althou ....