The Scottish Government's admitted it won't be able to plant enough trees to meet its climate and nature targets, following cuts of £32 million to grants for planting new woodlands.

This week, as farmers gather in Birmingham for the machinery show LAMMA, we're talking about the latest developments in field hardware. Methane is a particularly potent greenhouse gas, and is produced by cows burping and farting, but it's also produced by slurry. Using diesel-guzzling machinery in the field contributes to greenhouse gas emissions, so how about using methane from farm slurry to fuel tractors instead?

Presented by Anna Hill and produced by Beatrice Fenton.