The Aztecs constructed chinampas .

Because the Chinampas helped agricultural and territorial expansion that, through a kind of rafts covered with soil, served to cultivate flowers and vegetables, as well as to expand the territory on the surface of lakes and lagoons of the Valley of Mexico; making Mexico-Tenochtitlan a floating city. They used them for agriculture and gain ground in the lake waters.

the court ruled that a state law that banned abortions (except to save the life of the mother) was unconstitutional

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powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.