I've seen the animations of icy meteorites filling the primordial oceans with (presumably) pure water, but rocks are not naturally 'salty', in a potato crisp sense, and extracted salt is from dried-out deposits originally from seawater. And why Sodium Chloride in particular ? 

The current high price of electricity and gas makes us all careful about how much we use. But if an extremely cheap form of energy generation was discovered (e.g. nuclear fusion) so that people were no longer worried about their gas and electricity bills, what would be the effect on the earth of the resulting huge unfettered increase of energy usage?

I was having a argument at collage about what would happen if the world would suddenly spin the other way. would you be flung the way the world was spinning or would you not realy notice any affect on your self. I am looking for the answer to end the arguing.

What is the reason having 72 % (I guess) Nitorgen in our environment ? What incident turned having it on perfect balance in ecosystem ?

Why is it that the UK don't want to have any knowledge in regards to what will happen in 2012? Yet in America & Asia they are fully aware of what will happen in 2012, I also know that scientists are fully aware of what may happen.

Why aren't the public aware & how can we destroy what is coming towards planet Earth? This meteor willl destroy every satellite known to government, knock the power grid in USA.  Leaving us all in darkness.

No phones, No network, No Internet, No freedom, what is going to happen?

I want know who was the first human being that discoverd that we are living on earth !

So we are yelling about Global pollution Global pollution !

What is the daily fuel (petrol, diesel, oil, gas,) consumption of entire earth ?

Do we have record of it?

Over the billions of years that the Earth has been orbitted by the Moon, its rotation has slowed by the slight resistance to the tide as it travels round the planet (relative to the Earth of course, it would appear static relative to the Moon).  The tide is of course caused by the gravitational pull of the moon and the equal and opposite gravitational forces of the Earth and the Moon keep the Moon nicely in orbit around the Earth.

As the force causing the braking effect of the tide is exerted by the Moon's gravity, there should be an equal and opposite force to the braking that is being exerted on the Moon.  As the tide is working as a brake on the rotation of the Earth, it would be expected that the bulge of tidal water is slightly ahead of the Moon with the Moon's gravity pulling it back.  I suspect that this bulge slightly offsetting the Earth's centre of gravity out of line with the Moon's centre of gravity and the Moon's centre of rotation might have some such effect.

Admittedly the effect would be rather small, but over the periods of time such as the time it has taken for the Earth's rotation to change from 6 hours per day to 24 hours per day surely there has been some effect.  If so, am I right in thinking that the Moon's orbit has quickened over time?  If so, I hope the Moon has stayed in equillibrium by adjusting its altitude (is that the right word?) and isn't thinking of leaving us to it once it has built up an escape velocity...