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.
Under its Montreal Protocol, a global treaty passed in 1987 to phase out ozone depleting substances like chlorofluorocarbons (commonly found in spray cans and refrigerants at the time), ozone depletion has stopped.