Table 2 Main resource consumption of construction area per square metre of house building.

From: Ecological effect life cycle assessment of house buildings based on emergy footprint model

Item

Unit

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

Average

Steel

t

5.05E − 02

6.21E − 02

4.44E − 02

5.19E − 02

4.22E − 02

4.54E − 02

4.51E − 02

4.17E − 02

5.05E − 02

4.37E − 02

4.78E − 02

Cement

t

2.17E − 01

2.53E − 01

1.43E − 01

1.44E − 01

1.10E − 01

1.14E − 01

1.20E − 01

1.13E − 01

1.14E − 01

1.02E − 01

1.43E − 01

Wood

m3

1.80E − 02

2.66E − 02

1.80E − 02

2.09E − 02

2.00E − 02

2.41E − 02

2.40E − 02

2.27E − 02

2.32E − 02

2.38E − 02

2.21E − 02

Glass

t

5.26E − 04

8.44E − 04

1.85E − 03

8.09E − 04

5.25E − 04

4.96E − 04

5.54E − 04

5.08E − 04

5.29E − 04

4.12E − 04

7.05E − 04

Aluminium

t

2.91E − 03

4.33E − 03

3.08E − 03

3.33E − 03

3.10E − 03

2.99E − 03

2.91E − 03

2.98E − 03

6.11E − 03

2.72E − 03

3.45E − 03

Energy

tce

4.47E − 03

4.19E − 03

4.19E − 03

4.14E − 03

4.23E − 03

4.29E − 03

4.57E − 03

4.05E − 03

4.30E − 03

4.11E − 03

4.25E − 03

Employed staff

person

3.82E − 03

3.14E − 03

3.00E − 03

3.06E − 03

3.07E − 03

3.08E − 03

3.28E − 03

2.78E − 03

2.92E − 03

2.37E − 03

3.05E − 03