What is the topic sentence for the following paragraph?
There are many ways that concerned consumers can do to reduce hazards or noise pollution at home. They can purchase noisy products such as garbage disposals and lawn mowers with reduced noise levels. They can also use sound-absorbing materials in their home. Carpeting can be installed instead of hard flooring, and cork and fabric can be used in rooms that tend to be noisy. Also, people can become less noisy themselves. They can learn to avoid shouting, to close doors without slamming them, and to play radios, TV sets, and stereos at moderate levels.