11.08.2015   BIOFUELS

Alternative Energy Sources

The following are possible renewable, sustainable energy sources which will also reduce greenhouse emissions:

• Nuclear power.

• Hydroelectric.

• Tidal.

• Wave.

• Wind.

Table 3.10. Agricultural practices which have the potential to increase soil carbon storage. (Adapted from Hutchinson et a/., 2007.)

Method

Rates3 (106 carbon/ha/year)

Impacts

Cropland

Reduced tillage

0.0-0.4

Reduced erosion, enhanced biodiversity, more leaching

Eliminate summer fallow

0.0-0.5

Reduced erosion, less leaching

More forage in rotation

0.0-0.5

Improved soil structure, fertility

Increased residue return and

0.0-0.3

Increased production

reduction in burning

Restore permanent grass

О

T

CM

d

More wildlife

and woodland

Organic residue use

0.1-0.5

—

Grazing land

Improved practices

0.0-0.1

—

Increase in productivity

0.0-0.3

—

(new species, irrigation, etc.)

aRates of potential carbon gain over a projected period of 20 years.

• Geothermal.

• Solar.

• Biological.