Oxygen-16 and Carbon-12 are stableisotopes of elements O and C respectively. Hence, they do not have half-lives. But Carbon-14 andUranium-238 are radioactive isotopes. Among them Carbon-14 has relatively short half-life as about 5730 years while Uranium-238 has a long half-life as about 4.5 billion years.
Answer is. uranium-238
Answer:The Gas that is being transported and the smoke coming out of the chimney
Explanation: non renewable energy resources comes from sources that will run out of like Gasoline coal etc
B- roots and steams that can store a lot of water
Through the umbilical vein.
