A: It is reported that the weather is getting warmer and warmer now.

B: One of the biggest issues facing us right now is global warming. Its effects on animals and on agriculture are indeed frightening, and the effects on the human population are even scarier. 

A:  The facts about global warming are often debated in politics and the media, but, unfortunately, even if we disagree about the causes, global warming effects are real, global, and measurable. 

B: The causes are mainly from us, the human race, and the effects on us will be severe.

A:  What is Causing Global Warming?

B: Carbon dioxide emissions from fossil fuel burning power plants

A:  Carbon dioxide emissions from burning gasoline for transportation

B: Methane emissions from animals, agriculture such as rice paddies, and from Arctic seabeds

A:  Deforestation, especially tropical forests for wood, pulp, and farmland.

B: Increase in usage of chemical fertilizers on croplands

A:I think We human beings should improve our behavior.