Despite the halt to the federal mask mandate for mass transit, people may still choose to protect themselves. For those who do, the type of mask and how well it fits matter.
As the effects of climate change escalate and countries around the world set goals for reducing greenhouse gases, renewable energy has become the path to a cleaner future.
One challenge for a greener future is capturing the electric power generated by wind- or solar-powered technology and storing it for later use, like when the weather is calm or at night.