Cheap electric bikes and charging stations are gaining popularity for some people who live in rural areas.
The number of households that have the technology on their property has more than doubled in the last three years, according to the American Council for an Energy-Efficient Economy.
The organization estimates there are about 12 million electric bikes in the U.S., and they make up more than 20 percent of the nation’s bicycle fleet.
Electric bike sales have increased more than 600 percent in the past decade.
In 2016, nearly two million households in the Northeast, Midwest and West had an electric bike.
The number is expected to reach three million in 2021, according the group.
Electric bike technology has come a long way in the short time since the invention of the bicycle in the early 1700s.
When electric bikes first became popular, many people didn’t have access to charging stations.
The lack of access meant people had to walk to the store to get their bikes, which was slow and expensive.
The cost of electric bikes has also been rising, especially in states where electric cars are still a big part of the transportation mix.
There is a lot of debate about whether charging stations and bike sharing are effective at saving lives.
But a growing number of research studies have found the bikes help people get to and from work and from schools, restaurants and grocery stores, and they save lives.
Researchers have been looking at the impact of charging stations in the rural areas, where many people lack access to power and where there is no electric vehicle to share.
The average cost of a typical electric bike is about $100, and that includes the cost of batteries, chargers and other equipment, said Brian Coyle, a senior scientist with the nonprofit Energy Efficient Technologies Institute.
People in rural states can pay a little more for electric bikes, but they can get better value, he said.