Remember that, in a pure hydrogen economy, the electrical generating capacity will have to approximately double because all of the energy for transportation that currently comes from oil will have to be replaced with electrically generated hydrogen. So the number of power plants will double, and all of the fossil fuel plants will be replaced.
The iPhone will reboot. Once it turns on, the default network settings will be restored. The Apple iPhone 3GS has many reset options. Wiping the network settings will reset all the current network settings to default. The Apple iPhone 3GS has many reset options.  Please let us know how we can improve this support content by leaving your comments below.
The iPhone is powered off by holding the Sleep/Wake button on the top right of the device for a few seconds until the power off slider appears. If you have an iPhone 6 or iPhone 6 Plus, the Sleep/Wake button is on the right side of the device. more effective solution may be to reset the iPhone. Resetting the iPhone can be accomplished by pressing and holding the Home button at the bottom center of the screen and the Sleep/Wake button on the top right of the device at the same time. Press and hold both buttons simultaneously for approximately ten seconds.