Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

What will be the fate of nuclear energy?

 The future of nuclear energy is uncertain, as it faces a number of challenges and opportunities.

On the one hand, nuclear energy has the potential to play a significant role in addressing global energy needs and climate change. Nuclear power plants are a reliable source of electricity that produce low levels of greenhouse gas emissions, making them a potentially attractive option for countries looking to reduce their carbon footprint.

On the other hand, nuclear energy also faces a number of challenges, including concerns about safety, waste disposal, and cost. Nuclear accidents, such as the Fukushima disaster in Japan in 2011, have raised public concerns about the safety of nuclear power plants. In addition, the long-term storage of nuclear waste remains a challenge, as it can remain radioactive for thousands of years. Finally, the construction of new nuclear power plants can be expensive, and some countries have been hesitant to invest in this technology.

Overall, the fate of nuclear energy will depend on a variety of factors, including the development of new technologies, public attitudes towards nuclear power, and the availability of other energy sources. Some experts predict that nuclear energy will continue to play a significant role in global energy mix, while others believe that it will be largely replaced by renewable energy sources such as solar and wind power.