What does this mean? Increase carbon dioxide emissions by 0.2 for each step forward for the rest of scenario three.

What are the answers for the following questions?

Due to its high humidity, the south often experiences severe storms with heavy rains called cyclones ,hurricanes, monsoons, tornadoes

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes. b. it burns more cleanly than crude oil products. c. scientists have developed new ways of extracting it. d. during its extraction, groundwater can be contaminated.