Which feature of nuclear fission reactions allows these reactions to take place in a chain reaction? Thermal energy is released and heats up the reactants.

More smaller atoms form that can undergo fission.

A larger atom is formed, which can then be split.

Neutrons start the reaction and are released during it.

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