In NZ it's massively common in areas that were once only suitable for sheep. But sheep products in the current environment are not worth anything, wool especial

In NZ it's massively common in areas that were once only suitable for sheep. But sheep products in the current environment are not worth anything, wool especially so. However, dairy has excellent value globally, So now these farms have converted to diary, but that means they need to improve the grass growth to be suitable for cattle which means irrigation. The last 10 years has seen massive swathes of land unsuitable for cattle converted to land suitable via irrigation in my country. This has led to destructive processes and pollution of rivers and water ways though irrigation and fertilisation. It's our dirty little secret.