Complex sentence: However, efforts to pass the ERA passed by Congress in the 1970s are still afoot, as well as efforts to pass a new equality amendment, and almost half of the U.S. states have adopted the ERA into their state constitutions.
Split into simpler sentences: However, efforts to pass the ERA are still happening, as well as efforts to pass a new equality amendment. Although the amendment hasn't passed yet, almost half of the U.S. states have adopted the ERA into their state constitutions.