The word 'megatonnes' is correct and usable in written English.
You can use it as a unit to measure a large amount, usually larger than one tonne. For example, "This new project will reduce emissions by a total of 3 megatonnes."
IT IS now widely believed that the dinosaurs' world ended not with a whimper, but with a bang specifically with the impact 65m years ago, in what is now southern Mexico, of an asteroid that released 100m megatonnes of explosive energy.
Such a quake would release an amount of energy equivalent to a nuclear explosion of more than 150 megatonnes (the Bhuj quake was of magnitude 7.5, or about 30 megatonnes).
The power of the blast was between ten and 15 megatonnes, about that of the most powerful nuclear weapons built during the cold war.
The commitment is dependent on accessing climate financing, but translates to a cumulative reduction of 401 megatonnes of C02 over the period 2020-30.
And in a new analysis conducted by Accenture for Vodafone, we have calculated that the use of mobile phones could increase the incomes of smallholder farmers by $138bn by 2020, an uplift of 11%, and reduce carbon emissions by five megatonnes.
In 2015, India consumed 990 megatonnes of coal, second highest in the world after China.
A calculating error created a blast equivalent to detonating 15 megatonnes of TNT, the bomb was the largest ever detonated by the United States – about 1,000 times larger than the bombs dropped on Hiroshima and Nagasaki at the end of the second world war.
Useful link americansouthwest.net/arizona/walnut_canyon/national_monument.html Around 50,000 years ago, when woolly mammoths and giant ground sloths roamed eastern Arizona, an iron-nickel meteor the size of three school buses streaked across the sky and slammed into the earth with a force greater than 10 megatonnes of TNT.
The 15-megatonne test on 1 March, 1954 was part of the intense cold war nuclear arms race and 1,000 times more powerful than the atomic bomb dropped on Hiroshima.
"But given that, for some countries in the EU, every megatonne of CO2 seems to be contested, I am sure that it will be fertile ground for more political trouble".
Part of the intense cold war nuclear arms race, the 15-megatonne Bravo test on 1 March 1954 was a thousand times more powerful than the atomic bomb dropped on Hiroshima.
