For example, jobs such as welding and painting are important to civilization as we know it, but experience has taught us that th
ese activities can be hazardous to human health. In addition, fumes in automobile and airplane factories can harm organic bodies that become exposed to their toxins in the assembly process. Even when the best precautions are taken, workers may still suffer from lack of adequate ventilation. What is the answer to these difficult dilemmas? Robots. Because machines don't rely on clean air or comfortable temperatures, because they can function even in the midst of deadly gasses, they can take over with ease where humans would suffer greatly. Working together, humans and robots can get the job done. What is the main idea?
The main Idea is "Robots are better assembly workers" because everything at the beginning of the passage leads up to how robots can be more productive in bad environments.<span />
D, because the answer is in the question : "a statistic is given that says how many boxcars could be filled with the garbage is dumped into earth's water..."
