how many years will it be before much of the world's topsoil is depleted to the point where agriculture will be unsustainable?

A: 25 years
B: 125 years
C: 60 years
D: 500 years

Earths energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your homes electricity, and explain why you chose that source. can someone give me some ideas, i’m kinda confused.