Add to this radiation. There is no magnetic field around Mars.

What is needed for quadrcopters is a small quiet petrol/gas engine. An electric battery has got too little energy. Usually it is just 10 - 30 minutes.

He looked more like operetta singer in this blond wig.

It looks impressive. However there is no good satellite imagery coverage of the whole Earth surface yet. Even though the size of the computer hard disks and digital cameras productivity already allow to do this.

Perhaps. But the space junk is already very serious problem.

Maybe instead of many satellites it would be better to have one powerful robotized HD telescope on the moon. Nowadays the satellite imagery of Earth is not good at all. It is often outdated by years (two weeks is nothing in comparison), sometimes misaligned by hundreds of meters, or nonexistent at all for some areas..

In this case we will know the telescope-digital camera location precisely and the automatic alignment of images to the Earth surface coordinates should be possible.

The Moon is also drifting but it is negligible. Satellites however do require the fuel constantly to stay in more or less precise orbit. Satellites are and always will be temporal poor-man solution.

Satellites' orbits are unstable. They do not carry on board telescopes. I suggest to place on the Moon a large international telescope directed to the Earth.

The distance is not the problem. There are telescopes already which make photos of planets around other stars.

The problem, however, is the clouds and fog. But the telescope-HD camera can make photos of Earth at the areas where the air is clear on that day.

To weeks... I work now on a map of the town with a satellite imagery from 2010. And besides it is offset by about 100 meters at some spots.

Two weeks is fine. Even two months is not that bad.

It means that satellite imagery of more or less good quality exists only for areas where there are a lot of well-to-do users, but not for, say, small towns in remote parts.

Robots can be miniaturized even further. Humans can not.

I mean we use daily maps which are built on satellite imagery 3 - 5 years old. And even this is only in large cities and in industrial countries.

Since the orbit of satellites are unstable the imagery is hard to connect with geographical coordinates precisely.

I do not think humanity can live in space. We on Earth are protected from deadly radiation by the massive iron-nickel rotating planet's kernel.

So let us place the HD telescope-digital camera on the surface of the Moon and direct it not to the remote stars, but the the Earth for a change.

It is clear by now that the space is extremely hostile environment for biological systems.

A robotized HD high-speed telescope-digital camera on the surface of the moon could provide nearly real time imagery of the whole Earth surface. It could be very useful for mapping Earth.

Satellite imagery is spotty. Satellites have unstable orbits. They contribute to the space junk issue.

Good maps of Earth can do a lot, a lot of good to our planet, - to reduce traffic pollution, to fight fires more effectively, and so on and so forth.

Robots are smaller than humans. They do not require tanks of oxygen. So the smaller more ecological rockets can be used.

The US government at least is trying to do something about it. Otherwise all we have got 250 mph cars and motorcycles on roads where speed limit is 3 times slower. And couple of underpaid tired cops, plus no automation of control.

It is easy to find the statistics of the WHO which show that the number of death per year is more than 1.5 million in the world and growing. Nowadays medicine can keep a person alive no matter what injury he/she has. Still the death toll is growing. It is the figures on the World War scale, but this time it is not Mussolini who started it.

Mostly to the quick medical response and hardware safety features. Even one traffic accident fatality or trauma is too many. It is absolutely avoidable.

Sociologists say that the 3rd World War is going on on the roads. More than 1.5 million people will be killed in 2013 in traffic accident. About 10 million wounded.

The theory is that primates are inherently aggressive and need a venue for this aggression. Pacifism ended the battlefields, so it is motorways and roads nowadays.

Some drivers want to violate traffic lights and speed limits no matter what. Cameras are an obstacle to this aggressive impulses.

I do not like to use radio-transmitters around me if I can help it. Electromagnetic radiation is not safe.

And I do not like to connect wires all the time. I would like to keep a computer with keyboard and mouse.