What is the cheapest material on the earth?

Answer 1

Here are some materials that are all tied for the title. Everything on this list is free.

You may have to pay somebody to collect it and bring it to you, and he may have to

buy some expensive machinery and pay some workers to do the collecting. But right

there at the source, nobody ever pays anything for these materials:

-- air

-- water

-- oil

-- coal

-- gold

-- silver

-- aluminum

-- iron

-- copper

-- Mercury

-- uranium

-- lead

-- magnesium

-- salt

-- sulfur

-- helium

-- natural gas

-- wood

-- top soil

-- lettuce

-- cotton