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.
Is that the whole question?
4.A im pretty sure !! hope it helps
A subordinating conjunction enables to give transition to the ideas of the sentence and it also enables to join a main clause to a subordinate clause. In the sentence above, the subordinating conjunction used in the sentence is Whether.
Always remember that the subordinating conjunction will be followed by a clause.
There are a lot of mammals that walk around the planet every day.<span />
