Table 1 Parameters including the combustion efficiency, charcoal decay rates, disposal rates for end-use wood products, recycling rates for recyclable disposed wood materials, and decay rates for waste wood products used to estimate the carbon stored in wood products made from the timber harvested in Maine, USA, and the carbon stored in the wood products consumed in the United States

Biofuel Biochar

Biofuel and charcoal

Combustion efficiency

96%

Charcoal decay\(\left(\tau \right)\)

0.007

Charcoal decay\(\left(\sigma \right)\)

0.0003

Disposal rate

End-use wood product

α

β

γ

Building

0.133

0.028

80

Exterior use

0.326

0.041

25

Home application

0.265

0.031

30

Newspaper

3.062

0.0

2

Graphic paper

1.006

0.0

6

Packing paper

6.036

0.0

1

Household paper

12.036

0.0

0.5

Recycle rate

Disposed wood product

λ

µ

Building

0.085

0.015

Home application

0.085

0.016

Newspaper

0.225

0.027

Graphic paper

0.225

0.027

Packing paper

0.225

0.027

Landfill decay rate

Waste wood material

ξ

ω

Building

0.997

30

Exterior use

1.178

20

Home application

1.329

15

Paper

0.821

5