Both Uses

massive
in
A Crisis of Confidence Speech by Jimmy Carter
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Point three: To give us energy security, I am asking for the most massive peacetime commitment of funds and resources in our Nation's history to develop America's own alternative sources of fuel — from coal, from oil shale, from plant products for gasohol, from unconventional gas, from the Sun.†

massive = very large
Point four: I'm asking Congress to mandate, to require as a matter of law, that our Nation's utility companies cut their massive use of oil by 50 percent within the next decade and switch to other fuels, especially coal, our most abundant energy source.†
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Definitions:

(1) (massive)
very large in size, number, or effect
(2) (meaning too rare to warrant focus)
In geology, massive can refer to a type of rock rather than the size of a rock.