Explain what happens in countries with a unicameral system that you think are negative? I like the streamlined efficiency of a unicameral system in a time wher

Explain what happens in countries with a unicameral system that you think are negative? I like the streamlined efficiency of a unicameral system in a time where technology is changing things so quickly. New Zealand, Denmark and Sweden have moved from a bicameral to a unicameral system. In the United States, Nebraska operates with one. What are the negatives?