Which of the following is an example of an emphasis on production quality?

Matter is recycled.

Emphasis is on pollution cleanup.

Emphasis is on renewable resources.

Natural resources are very important.

The first three options refer more to the emphasis on the environment: they emphasize the environmentally friendly way of production through recycling, limiting waste and using renewable resources: they don't say anything about the quality of the production.

The correct answer is: Natural resources are very important.