In use since Roman times, today the salt pans are the source of 18,000 metric tons (20,000 tons) of salt a year.
Salt pans, the source of 18,000 metric tons of salt, have been in use since Roman times.
Salt pans have only been in use since Medieval times.
Students playing the school ground on the break time
A man looking at something.
The child will be quite tired.
A hand is sitting idly.
The Old One was normally comforting.
You probably are aware that there will be many more bags and a ton more waste.