The US Act that required drugs to be classified according to their medical use, potential for abuse and possibility of creating dependence would be the Controlled Substance Act.
Our lung capacity naturally starts to decrease at the age of 30. By the time we reach 50, it could be decreased by half. I'm not sure about when we reach 90 though. Hope this helps! :)
exercising once a day for 30 minutes keeps your body healthy and fit. so when you are getting older and ready for retirement, you can still enjoy vacations and outdoor activities that require the use of your muscles.
