It's free to use, 'free' of cost, except for what we directly spend on reaping the earth's bounty.
But the earth's resources are not unlimited. The earth's resources are certainly not free.
Here's a TED presentation by Pavan that puts across to us the dangers of our assumptions:
If we keep on reaping where we do not sow, there will be less and less for our generation.
And future generations are losing forever what we so casually 'take' for granted.
First, the price will now be paid by the poorest and most vulnerable.
The biggest offenders are the big corporations and the governments that let them loot our present & our future for a pittance.
LET'S MAKE A CHANGE
Related post: http://bit.ly/tdxuJQ whats-in-a-name