Which choice below represents a negative impact that chemistry has on society? A. development of cancer treatment drugs
B. development of Teflon, the nonstick material used in cookware
C. combustion of car engines producing pollutants in the air
D. the development of nuclear power plants used to produce electricity

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.