If anyone is looking for ideas on how to make the world a better place, look into figuring out how to shift the culture so that air drying becomes more common. Also composting toilets.
Edit: Drying clothes uses 56 billion kWh of energy in the US.[1] Another related area that needs work is standby power.[2]
[1] https://www.eia.gov/tools/faqs/faq.php?id=96&t=3
[2] https://www.nytimes.com/2016/05/08/science/just-how-much-pow...