Dear Mohammed,
What a great essay! I wish I would have been able to write so intelligently when I was an undergrad. Anyone who quotes Hawkings, Von Neumann, and Drexler at the beginning of a paper is on the right track. Then again, Alexandria has been a center of learning for millenia, so you have a great tradition to uphold. :-)
Now for the critical comments: :-(
Science (the discovery of how the universe works using the scientific method) is not the only steering mechanism; by covering only one aspect you have limited yourself unnecessarily. Engineering, economics, politics, media, emotion, philosophy, and religion are also powerful influences on our future. Discoveries in science are exciting, but they must be applied to real-world needs--specific technologies for which money will pay for so that more scientific discoveries can be made. I love science and technology, but then found presentations by Ralph E. Grabowski and Stanley N. Lapidus which dismayed me very much because it showed that if your research and development budget is not matched by an equivalent or higher amount of money on understanding how your market might need your product, you will fail. To make matters worse, it correlated with my own experience with a number of technically superior products that failed (e.g. Lisp machines). See http://www.marketingvp.com/guests/bridge/index.htm
Your comments about improving the publishing process by having authors rate each other has one serious drawback -- really new ideas are often controversial. This why Socrates was made to drink poison, Aristotle fled Athens, why Thomas Aquinas was banned by a few bishops (for "Christianizing" Aristotle), and why the U.S. multi-billion-dollar National Nanotechnology Initiative has essentially zero dollars allocated for molecular manufacturing. If there was an objective way to score papers, perhaps by non-emotional computers who could really understand them well enough to compare and contrast them with reality, that might help. In my own my essay Three Crucial Technologies ), I discuss how the RDF/OWL representations of knowledge might help (I also talk about nanotechnology and a space-faring civilization).
Your idea about publishing negative results being a duty is very good, but as a young techno-enthusiast, you're forgetting at least two issues:
1. Original papers about stuff that works are much more fun to read than experiments that have failed.
2. In a "publish or perish" environment, it is difficult to boycott a journal.
Perhaps there might be a easy and effective way to implement this? Perhaps all electronic versions of journal papers should be followed by a comments section, as done for this contest? Negative results could also be entered in such a format; the advantage would be that readers would immediately learn about these failed results.
You wrote that "environmental and sustainability problems are among the bigest problems faced by humanity". I beg disagree strongly. War, injustice, poverty, and ignorance are much more threatening. Fix injustice and ignorance, and that will take care of poverty. Take care of poverty, and you don't need to worry about the environment. Jesse Ausubel at Rockefeller University aggregated data from the United Nations Food and Agriculture Organization (FAO) for more than 200 countries to find that every country with a per capita GDP greater than $4,600 is gaining forests (seehttp://www.rff.org/rff/News/Features/upload/26441_1.pdf). Solar power is almost at parity (depending on how you measure); continued progress in lowering costs and increasing efficiency will do wonders for solving many environmental and sustainability problems.
Your idea of requiring govenment to follow scientists made me laugh (sorry). Can you imagine those in power accepting limits on their power?
You touched on the importance of fixing ignorance through the use of a number of computer-enabled solutions (OLPC), so we're on the same page there.
You pointed out that 26% of Americans did not know that the Earth revolves around the Sun; I am totally embarassed, but also shocked that the EU did worse. As far as increasing numbers of Americans believing in astrology, again I am very embarassed, but given that Christianity is an antidote to superstition, and that it is under attack in the U.S., I'm not too surprised. I suspect that monotheism would make that also true for devout Muslims--Have you heard one way or the other?
The turmoil in Egypt has been on news quite a bit, so I worry that you personally may suffer from the same persecution that Averroës (Ibn Rushd) suffered. I would ask Allah to bless and protect you, but he is utterly transcendant and perhaps not beneficient (according to the 2nd most important preacher in Islam, al-Ghazali, in "Moderation in Belief"), plus I'm not Muslim so he probably wouldn't listen to me anyway. I'd ask God to bless and protect you except than you might be offended (I don't know your religious beliefs).
So just remember thqat you have people around the world thinking about you and wishing you the best (and likely willing to provide aid if you ever travel to their countries).