The phrase "are massive quantities of" is correct and usable in written English.
It can be used when discussing large amounts or volumes of something, often in a descriptive or analytical context.
Example: "In the study, researchers found that there are massive quantities of plastic waste in the ocean, posing a significant threat to marine life."
Alternatives: "are large amounts of" or "are substantial quantities of".
The investor said, "Cardiogram is doing something I'm excited about in general, which is taking massive quantities of data from new sources, in their case from wearables…and applying state of the art machine learning techniques to it so that people can gain something from it on their own".
Crowder calculates that cargo airships make sense economically only when they're moving massive quantities of cargo — not twenty tons, what the LMH-1 could haul, or even sixty-six thes, the capacity of Pasternak's smallest Aeroscraft, but more on the order of five hundred to a thousand tons, the payload of a super-jumbo carrier.
After all, she was transporting massive quantities of cocaine and heroin from coast-to-coast.
Another source of worry beyond the impact of Afek's project on water quality is the massive quantities of water needed for fracking.
This two-year investigation brought national attention to Griffith, where the Society was growing massive quantities of marijuana between orange trees or grape vines.
Russia, currently the world's largest oil producer, is shipping massive quantities of oil, mostly to Europe, but also to the Far East though its extensive and far-flung and expanding network of pipelines.
However, the clustering powers of conventional multivariate analyses are inadequate when massive quantities of sequence data from a wide variety of genomes are analyzed collectively.
On the other side are people who believe in free speech and argue that millions of sane people who are exposed to massive quantities of movie violence never so much as lift a finger against their fellow citizens.
Many of the countries that are piling on massive quantities of debt to bail out their banks have only tepid medium-term growth prospects, raising real questions of solvency and sustainability Italy, for example, with a debt-to-income ratio already exceeding 100%, has been able to manage so far thanks to falling global rates.
In addition, some hospitalized patients were in shock when first seen and were rehydrated with massive quantities of fluids, which may have aggravated pulmonary edema and contributed to death.
