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(a) control; (b) the/this; (c) reason/cause/factor (d) produced/emitted/released; (e) purposes/reasons
It is true that most of the natural phenomena are beyond our control, yet we can (a) control some aspects like the greenhouse effect by our responsible activities. We are highly responsible for (b) the/this radical climate change. Carbon dioxide is the main (c) reason/cause/factor of climate change. Carbon dioxide is being (d) produced/emitted/released in the atmosphere by the burning of fossil fuels. Moreover, mineral oil and natural gas are also used for various (e) purposes/reasons.
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