My favorite piece of technology, although I do not use it commonly, are solar panels, because they do not pollute and take advantage of the energy of the sun to produce electricity, these panels are constituted by cells that capture the photons ,these can be incorporated into various devices like ,solar cars, solar houses where you can even heat up Water with the energy absorbed by the panels, there are also solar cars that help reduce the consumption of fossil fuels.

Also the solar panels are very useful for camping, you can charge cell phones, lanterns and musical instruments.

For being friendly with the environment I consider it my favorite piece of technology and at country level, I already incorporated it into the community, like solar public lighting

Say if clean energy and say no plastic bags

Bye bye bye