Fossil fuels are energy sources often used to generate electricity in power plants or provide fuel for vehicles. which of these would be considered an externality, or external cost, associated with the use of fossil fuels as energy sources?

a. the cost of extraction of the fossil fuel from the ground.

b. the cost of building the infrastructure at the power plant.

c. the cost of transporting the fossil fuel from a source to its destination.

d. the cost to global systems as carbon emissions increase from fossil fuel combustion, leading to climate changes.

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.