By 2020, the world will need to buy about 5.7 billion metric tons of fluorine-99.7 percent of which is needed for industrial use.

The rest will be used for domestic use, in vaccines, pharmaceuticals and cosmetics.

But the energy density of fluorines has remained constant, according to the researchers at the University of California, San Diego.

The key finding is that the energy of fluorinated atoms has changed.

It has been increasing from a constant around 300 MeV in 1957 to almost 4.4 MeV now.

It was a factor of 10 higher than in 1962.

But it has decreased steadily since 1962, to about 3 MeV today.

That’s because fluorine has become less dense than other atoms, which is why the energy per unit mass has decreased from a factor 10 energy density in 1957, to a factor 5 today.

“The change is not due to the reduction in energy density, but because the atom has changed its position in the periodic table,” said Robert T. Einhorn, a professor of materials science and engineering at UC San Diego and lead author of the study.

The researchers found that the changes in fluorine’s energy density were due to a combination of a change in the properties of the atoms, and changes in the materials that they were made from.

“Fluorine has undergone a long evolution in the chemical evolution of the periodic tables, and it’s only been recently that we’ve had access to materials that allow us to actually understand that evolution,” Einhart said.

Fluoroacids have been the focus of some recent research, with scientists investigating how the atomic lattice of fluorin atoms changes under different conditions.

One recent paper has shown that fluorine undergoes a number of chemical reactions as it is exposed to light.

“We don’t know what the molecular state of fluorina atoms is like, but it’s a fascinating study,” said Christopher M. Biederman, an associate professor of chemical engineering at the Johns Hopkins University who was not involved in the study, adding that the team has been able to measure the energy change and to make some measurements of fluorino molecules in a number.

A team led by Einhams team is currently testing how fluoroacid molecules respond to different light conditions.

The results will help determine if the changes are the result of chemical interactions between fluorine and light, or if they are due to changes in light absorption by fluorine.

“This paper provides the first detailed study of the changes of the energy content of fluorinos in light, as they are produced by the chemical reaction that they undergo under light absorption,” Einshorn said.