Can anyone give me verifiable data on the manufacturing energy cost of sheeps wool and Rockwool/fibreglass insulations and the environmental impact of each product. I'm trying to come to a decision on which to use in my new house but there seems to be an absence of relevant data for these products.

I know which is the more pleasant to use but is this how I should choose?

I know that fibreglass and Rockwool are produced by melting glass and a mined mineral.
Is the glass recycled?
How much energy does each process use? How much co2 and other green house gasses are produced?

I know that sheep wool comes from sheep which need grass and concentrated feed produced using machines, artificial fertilizers produced from fossil fuels, some toxic chemicals such as formaldehyde and dips. Sheep also produce lots of methane which is a greenhouse gas. Cultivation and management produces co2.and more methane.
I'm assuming that the environmental cost of delivering these products is similar although perhaps sheep wool costs could be higher because of small scale decentralised production.
I'm sure that Rockwool and fibreglass production creates local pollution and environmental damage. I have read that sheep farming has destroyed some of our best upland habitats and prevents regeneration of woodlands. Fertiliser runoff pollutes lakes and streams.
How does one decide which is the greener insulation?

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