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Re: Many environmentalists believe [#permalink]
can you point out the difference between diffusion and dissipation?
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Re: Many environmentalists believe [#permalink]
Dissipate means to become thin and finally disappear. Diffuse means to spread out into another state without disappearing. The disappearance is the key difference between dissipate and diffuse. If the CO2 dissipates in the air, why will we worry about it? Only because it traverses to the atmosphere and slowly starts building up, high levels turn problematic.
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Re: Many environmentalists believe [#permalink]
The answer I believe is 1.) Planting
2.)Development
3) diffusion
The question becomes pretty simple if you plug in the answer choices and break it into chunks.
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Re: Many environmentalists believe [#permalink]
"to reverse" signifies that first two blanks must be positive ones.

So, first blank is planting.
Second blank is "development"
third blank must mean "presence", only diffusion fits nicely
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Re: Many environmentalists believe [#permalink]
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