Alas, the first Green Tip of the Day.
I thought this tip to be especially appropriate in the midst of these beautiful summer months.
I understand, you're just trying to do favors for your waistline when you pound out a six mile run on the treadmill at your local gym. However, you're most likely going through gas to transport yourself to the gym and then using up electrical energy on those cardio machines. A treadmill averages 600-700 watts of energy. By taking your cardio to the outdoors for 150 minutes per week, you are saving an annual 110 pounds of carbon emissions... Even more if you factor in the televisions that many cardio machines come equipped with these days.
Even if it's just once or twice per week, try to run or walk outdoors whenever the weather permits. The Vitamin D fix will boost your mood and you can fight boredom with frequent changes in scenery. The website Map My Run allows you to search for popular running routes in your local neighborhood, as well as track your mileage and calories burnt.