The plant produces a (great/large/huge) 'mass of' blossoms every spring. = The plant produces 'masses of' blossoms every spring.
The mayor is trying to encourage more commuters to use 'mass transit' in order to alleviate traffic in the city.
His policies are supported by 'the' (great/broad) 'mass of' the people. [=by most of the people]
(..) Wait. He's antimatter, right? The only way to destroy antimatter is with matter. All we have to do is hit him with something of equal or greater mass. What are you gonna do, chuck a planet? Why not? If he wants Oa so bad, maybe we should give it to him. Kid, you just earned your stripes. (..)2011 Green Lantern: Emerald Knights