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In the context of which one of the following are the terms ‘pyrolysis and plasma gasification’ mentioned

In the context of which one of the following are the terms ‘pyrolysis and plasma gasification’ mentioned?

(a)

Extraction of rare earth elements

(b)

Natural gas extraction technologies

(c)

Hydrogen fuel-based automobiles

(d)

Waste-to-energy technologies

Explanation

Like incineration, pyrolysis, gasification and plasma technologies are thermal processes that use high temperatures to break down waste. The main difference is that they use less oxygen than traditional massburn incineration. Thus these belong to waste to energy technologies.