The Radio tower is MUST-HAVE for email alerts. When your yard get attacked, the radio tower responds, sending an email to your inbox, showing the picture to the left. It is also possible for the email to be sent to your cellphone, if you have the texting plan. Ask your carrier for details.
The only problem is, people can use your email to send faulty alerts to you. Beware of this.
The person writing this still has his email open since the dawn of the Radio Tower.
This tower still sends you a message when destroyed, so use as part of NEC (Never Ending Chain)