Therefore, you may be tempted to choose running shoes for elliptical workouts with the assumption that running shoes will properly protect you from physical impact. However, running shoes are often too stiff for elliptical training, which requires a more flexible sole.
âThe Montreal Protocol puts limits on the production and consumption of ozone-depleting chemicals, creates an administrative scheme to enforce these limits, and requires periodic assessments of these limits.
Following this lesson, you'll be able to: 1  Explain when ozone is helpful and when it is harmful. 2  Describe how CFCs react with ozone and the effects that this reaction causes. 3  Summarize the research findings on the ozone layer, beginning in the 1970s. 4  Identify the importance of the Montreal Protocol as it was originally signed and as it stands today.