What is the relationship between watching television and global warming?

Increasing demand for flat-screen TVs, according to estimates, could have a greater impact on global warming than the world's largest coal-fired power plants. Flat screen manufacturers use a greenhouse gas known as nitrogen trifluroide, and as these displays are becoming more and more popular, annual gas production has grown to about four thousand tons. Nitrogen trifluroid is the most dangerous global warming engine, for comparison, this gas is 17,000 times stronger than carbon dioxide.

b

explanation:

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,