Following is a transcription of the video: Narrator: Here in the New Zealand countryside, 25,000 sheep are sheared in just 10 days. Tom O'Sullivan: It's a nightmare trying to keep the sheep still.

Drones are also used to monitor land, check on water and feed supplies, and to check on livestock without disturbing them. Farmers in New Zealand have found a new way to herd their sheep.

Even with a carbon price of zero, about a fifth of sheep and beef ... of a pine-filled landscape. "We appreciate that having more pine trees is not the solution to New Zealand's problems," she ...