This is a joke, this contest was started 6 months ago and getting extended every next month. I have 4 letters in my inbox saying that "It will not be extended any more". I report this contest and ask freelancer support to resolve this humiliation done to hundred of freelancers who have put effort in it. Any rating to submitted entries hasn't been provided yet but it got extended for 6th time.
We spend a lot of time on your research. We humbly ask you to research and reward any one research articles. Otherwise all our research articles will be wasted. We are ready to research and provide more information.
I have found another one low cost real life invention(Specially designed natural mask).It has been successfully implemented in India.i have ready for submit about this invention research.