Introduction and context: global biomass resources - Biomass as Energy Source: Resources, Systems and Applications - page 14

Figure 1.4. Insects at a food market in Beijing, China.

Table 1.8. Projected consumption of livestock products per billion people based on 2002 population
estimates.

Year 2010 2020 2030 2050 Growth 2010 to 2050

Human population (billions) 6.83 7.54 8.13 8.91

Consumption (million tonnes per billion people)
Bovine meat 9.85 10.25 10.93 11.93 121%

Ovine meat 1.94 2.08 2.28 2.64 136%

Pig meat 14.98 15.29 15.98 15.79 105%

Poultry meat 12.58 14.72 17.65 21.69 173%

Dairy 96.24 100.19 106.77 116.55 121%

Sources: FAO, 2006c; World Population Prospects, 2002. Some calculations made by the authors.

This can be compared to horses with the weight 500 kg:

Units MJ Protein [g]

Total nutrients 79 440

7 kg hay 56 280

2 kg oats 23 160

For a sheep without kids it may be as below:

Units MJ Protein [g]

Total nutrients 9.6 64

1 kg hay (DS) 9.6 65