Why might it be advantageous to use nonrenewable resources over renewable resources?
a.
the use of nonrenewable resources can be cheaper and more efficient than the use of renewable resources.
b.
nonrenewable resource use has a lower impact on the environment than renewable resource use.
c.
nonrenewable resources are always more readily available than renewable resources.
d.
all of the above

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit