Sustainable Food Guide
UK SD Indicators for Agriculture 2010 show 50% drop in fertiliser use in last 20 years
|Nitrogen plays a major role...
Largely overlooked, the amount of "reactive" nitrogen (Nr) in the air has risen considerable in last 50 years. Since 1970, world population has increased by 78% and reactive nitrogen creation has increased by 120%. (More in Science article)
N2O is produced naturally in soils through the microbial processes of denitrification (during which water-soluble nitrates are converted to gaseous products, including nitrous oxide N2O). These natural emissions are increased by a variety of agricultural practices
Direct addition of nitrogen to soils:
80% of nitrous oxide emissions globally are associated with the agricultural and waste-treatment industries, most coming from artificial fertilsers (evidence?). Livestock accounts for about 65% of human made nitrous oxides according to LEAD.
| Environmental Practice at Work |