Vagal maneuvers are used to try to slow an episode of fast heart rate. These simple maneuvers stimulate the vagus nerve, sometimes resulting in slowed conduction of electrical impulses through the atrioventricular (AV) node of the heart. Be sure to talk to your doctor before trying these. Vagal maneuvers that you can try to slow your fast heart rate include: Gagging. Holding your breath and bearing down (Valsalva maneuver). Immersing your face in ice-cold water (diving reflex).
Some examples of renewable energy sources are solar energy, wind energy, hydropower, geothermal energy, and biomass energy. These types of energy sources are different from fossil fuels, such as coal, oil, and natural gas.
Non-Renewable Energy. Non-renewable fossil fuels (crude oil, natural gas, coal, oil shales and tar sands) currently supply Australia with more than 95 percent of our electrical energy needs. Non-renewable energy is energy produced by burning fossil fuels such as coal. They are non-renewable because there are finite resources of fossil fuels on the planet. If they are continually used, one day they will run out. The Source of Fossil Fuels. Just as plants do today, those living millions of years ago converted the sun's light energy into food (chemical) energy through the process of photosynthesis.