Sample Thesis Statements (Weak) Nuclear power is a good resource to provide electricity but has its negative impact. (Improved) The twentieth century provided a nuclear alternative that provides a relatively clean option for electrifying the world, but this source can make a negative impact on the environment. (Better) The twentieth century’s nuclear research has provided a fresh technology that is a relatively clean and generally safe source that meets modern electrical demands, but it also carries the threats of bio-radioactive exposure, nuclear plant disasters and the impact of possible long-term global environmental scars.