Two resources are known to exist in large quantities.
Gypsum, sulfur, fluorite, arsenic, alum, and asbestos also exist in large quantities.
"The only U.S.-produced items that I can think of that exist in large quantities in China are dollar bills," said Matthew Crabbe, the managing director of Access Asia Ltd., a market research firm.
Heavy crude oils exist in large quantities in the western hemisphere, but are difficult to produce and transport because of their high viscosity.
We hope that future work on magnified images of entire leaf vein networks (which currently do not exist in large quantities) can confirm these results (see Discussion in [ 31]).
Southern China has extraordinarily valuable varieties, such as "fragrant rosewood" (Dalbergia odorifera), but they have been overexploited and may never have existed in large quantities.
Just the prospect that it exists in large quantities is enough to excite certain people, like the planetary scientists, who could learn by studying it, and the interplanetary dreamers, who view it as a source of nourishment and ultimately of fuel for future explorers.
If methane exists in large quantities, it might be mixed with other volatile gases to make rocket fuel, thereby saving a considerable amount of money (since it may cost upward of several hundred thousand dollars or more to transport a pound of anything to the surface of Mars).
Yet pure radium can be prepared in ponderable quantities while the other radioelements, except the slowly disintegrating uranium and thorium, are not capable of preparation in quantity, most of them because they exist in much smaller quantities.
They exist in a large variety of distinct ecologic niches.
