Wasting wood is a serious problem in conserving the resources, which are distrib

Throwing away food means wasting the resources used in its production, such as water. This is especially foolish in dry countries such as Spain. The problem is set to get worse as climate change makes rainfall patterns less predictable.

Technologies such as Apple’s iBeacon have attempted to fill in holes with linked sensors that track indoor location using Wi-Fi or Bluetooth, but a new ground-based system by Australian company is the first to produce a signal that merges seamlessly with the GPS network. And it is incredibly accurate.