Need help pls answers it’s year 10 work

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.

What are the names of these two interactions with cattle and how do they differ from each other