Exact(4)
Out of total reserve, 266.00 billion tones are the proven reserve of non-coking coal.
From the present research data the worldwide total production of Portland cement is about 2.6 billion tones, mostly used in the production of concrete.
But perhaps most catastrophic of all, the dead trees would release in excess of 900 billion tones of carbon dioxide into the atmosphere.
Methanogens are ancient organisms that are key players in the carbon cycle accounting for about one billion tones of biological methane produced annually.
Similar(56)
It has five tones, not four.
Cantonese has six tones, and Min Chinese dialects seven or eight.
Most scales employ four or five tones with equidistant intervals.
Scales feature four or five tones with mostly equidistant intervals.
Another case of interference results when two tones sounded together produce a subjectively heard third tone.
As described in the Octoechos ("The Book of Eight Tones"), there are eight tones whose composition is traditionally attributed to St. John of Damascus (8th century).
Modern Standard Chinese has four tones, while the more archaic Cantonese language uses at least six tones, as did Ancient Chinese.
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