Ten years ago, Bill Gates created the X Prize when it comes to this field, the Reinvent the Toilet Challenge. After the start of this competition, a lot of teams have put prototypes in this area.
Carbon dioxide catcher
As you may have known, practical and inexpensive methods to catch carbon dioxide from the air can absorb the emissions caused by greenhouse gas.
Even when we can slow carbon dioxide emissions, the warming effect made by the greenhouse gas can exist for a long time. In order to avoid the danger from rising temperatures, the climate panel from UN concludes that the world will have to remove a huge amount of carbon dioxide from the air now.
Last summer, a climate expert from Harvard University measured that the machines are able to pull this off for less than 100 dollars a ton, via a way called direct air capture. This is known as an order of magnitude that is cheaper that earlier estimates resulting in many scientists to dismiss the technology because of being too costly. But it may take years to reach that level. However, when you capture the carbon, you will have to be clear about what to do with it.
The Carbon Engineering located in Canada is going to expand its pilot plant in order to ramp up the synthetic fuel generating by using this carbon dioxide catcher.
Sanitation without sewers
Nowadays, toilets can work without the need for a sewer system in order to save energy to the most. About 2 billion people do not have a right sanitation awareness. The lack of proper toilets motivates people to dump fecal matter into the ponds and streams. As a result, bacteria as well as viruses are being spread and causing such diseases as diarrhea. One in nine child has to die because of this disease.
Now researchers are trying to set up a new kind of toilet which is cheap enough for the developing cities and is able to both disposing waste and treating it in a proper manner.