CPD: Carbon impacts of timber in construction

Approximately how much of a tree’s mass is made up of biogenic carbon?

What modules must be assessed in an EPD produced in accordance with BS EN 15804:2012+A2:2019?

Where is sequestered carbon accounted for within an EPD produced in accordance with BS EN 15804:2012+A2:2019?

What standard should be referred to when assessing the environmental impact of a building?

When can sequestered carbon in timber be taken into account when assessing the carbon impact of a building?

When the timber is sustainably sourced, and an upfront carbon assessment is undertaken
When the timber is sustainably sourced and an operational carbon assessment is undertaken
When the timber is sustainably sourced and a whole life carbon or embodied carbon assessment is undertaken