I’ve seen Earth compared to all its water before, but this image really gives you a perfect idea on how fragile our planet is by adding all the air in another sphere. The density of the air pictured here corresponds to its density at sea level (one atmosphere.)
Here’s the high resolution image made by Globaïa’s Félix Pharand-Deschênes, based on a concept by Adam Nieman for the 2002 Earth Summit in Johannesburg:
If we don’t take care of that little water and air, we are screwed.