Water source is a big problem in most developing countries. Millions of children get sick and many die because of drinking unsafe liquid. Fortunately, technology has produced a very cheap way to make drinking water clean. It's still not perfect, but the LifeStraw can filter and kill plenty of bacteria from water for only three bucks.

This nine-inch gizmo contains layers upon layers of mesh filters to block bacteria, before iodine beads that will kill survivors. There's active carbon too, to remove taste of iodized water. A single LifeStraw can clean up to 185 gallons of water, which should be enough for a year.

With that said, it's not at all complicated to use. Vestergaard Frandsen S.A. company CEO Mikkel Vestergaard Frandsen said, "You have to suck pretty hard at first to get it moist, but after that it's easy."

From making mosquito nets and anti-malaria plastic sheets, this man has come a long way to saving people's lives. "As a businessman, I can be proud to get a contract for 2 million bed nets and fulfill it on time. But as a person, I can be proud that over the lifetime of the nets they will prevent the deaths of 400,000 children," he added.

People frown upon stuff that are genetically modified because they are deemed unnatural. But would you mind having genetically modified mosquitoes around if in the end they would be able to eradicate malaria?

This is the impending question underlying the fact that GM mosquitoes have been produced to be resistant to the malaria parasite, which has been known to kill three million people annually. The initial impression is that GM mosquitoes are naturally weaker than the hardcore wild ones. But all that's about to be debunked now as the National Academy of Sciences has garnered sufficient proof to show that the GM mosquito can actually go head to head, and even outrun them natural bloodsuckers.

The team, with Dr. Marcelo Jacobs-Lorena of the John Hopkins University in Baltimore, tweaked with the insects so that they will be able to create a protein which will block the malaria parasite from getting into the mosquito's system after drinking blood from its victim. With this, they will no longer be carriers of malaria.

Now the only thing left for them to do is to breed some more of them genetically modified mosquitoes. Hmmm... I wonder if they can also make one that doesn't bite.