Final answer:
It is not safe to leave frost on your windshield and windows during winter trips, as this can impair visibility and is often against the law. Clear visibility is essential for safe driving, despite the improved fuel efficiency of modern cars. Home insulation also plays a key role in conserving heat and reducing fuel costs during exceptionally cold winters.
Step-by-step explanation:
In short, it is not recommended to leave frost on your windshield and windows during short trips in winter. Visibility is crucial for safe driving, and frost on your windows can significantly impair your ability to see pedestrians, road signs, and other vehicles. While modern cars are more fuel efficient, which signifies that engines can run more effectively even in cold weather, this does not justify compromising safety. Removing frost and warming up your vehicle might take a few extra minutes, but it ensures that you can drive safely with clear visibility. Additionally, most regions have laws that require drivers to remove any obstructions on their windows for safe driving. In terms of home efficiency during cold seasons, it is important to make sure your furnace is working properly and that there is enough insulation on windows and doors to conserve heat and reduce fuel costs.