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 city was the first in the United States to adopt a Fair Housing Act, and what were its effects?

 The first city in the United States to adopt a Fair Housing Act was Chicago, Illinois, which passed its Fair Housing Ordinance in 1968. The ordinance was designed to prohibit discrimination in housing based on factors such as race, religion, national origin, and sex.

The Fair Housing Ordinance in Chicago had a number of effects, including:

Prohibiting discrimination in the sale, rental, and financing of housing

Establishing the Chicago Commission on Human Relations to investigate and enforce the ordinance

Providing for civil damages and criminal penalties for those who violated the ordinance

The adoption of the Fair Housing Ordinance in Chicago helped to set a precedent for other cities and states to adopt similar laws, and it contributed to the development of federal fair housing legislation, such as the Fair Housing Act of 1968, which was passed by the U.S. Congress later that year.

Overall, the Fair Housing Ordinance in Chicago and similar laws at the local, state, and federal levels have had a significant impact in promoting fair and equal access to housing for all Americans, regardless of their race, religion, national origin, or other characteristics.