* What are the major causes of death in each stage
of the demographic transition?

During the first phase, the population growth rate rises as the death rate declines while the birth rate remains high. In the second phase, the growth rate declines (but remains positive) due to a decline in the birth rate.

Explanation:

yes and no. The way they are made is efficient and in a way renewable over time. So that's the only disadvantage. Unlike the other styles of pencils they can degrade because their shell isn't made out of a non degradable source.