Exact(60)
A tonne saved is still a tonne saved.
A tonne of coal fetches around $120.
That's about half a tonne.
Maize grains cost about $80 a tonne.
"This weighs about half of tonne.
"We're breaking that record by one tonne".
The sludge fetched about $300 a tonne.
This February alone one tonne was seized.
The cost saving was 57% per tonne.
Prices have fallen to $3,100 a tonne.
International spot carbon prices vary from around US$13£8.4.4) a tonne in California to $6 a tonne in China and $9 a tonne in South Korea.
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