Which of the following statements describes all the variables in an experiment

Explanation:

The United States is a power hungry country with a popular of nearly 400 million people.

Providing power to such a large population, both cheaply and reliably is not easy and takes various forms of power plants and energy methods to make sure energy is available to everyone.

When it comes to using electric driven cars, it becomes unreliable, since most electric cars have a limited range and the United States being a large country cannot currently support this.

People would rather use their cars which can provide up to 500 miles of mileage than an electric car which hardly goes 100 miles.

However, the impact of increasing fossil fuels can negatively impact biodiversity in surrounding ecosystems. Increasing carbon monoxide in the air will only lead to degradation of plant and animal life.