Search results
Results From The WOW.Com Content Network
Out of a total of 28,400 terawatt-hours (96.8 × 10 ^ 15 BTU) of energy used in the US in 1999, 10.5% was used in food production, [3] with the percentage accounting for food from both producer and primary consumer trophic levels. In comparing the cultivation of animals versus plants, there is a clear difference in magnitude of energy efficiency.
The efficiency with which energy or biomass is transferred from one trophic level to the next is called the ecological efficiency. Consumers at each level convert on average only about 10% of the chemical energy in their food to their own organic tissue (the ten-per cent law). For this reason, food chains rarely extend for more than 5 or 6 levels.
Critics cite the example of farmers in Vietnam being paid a premium over the world market price in the 1980s, planting much coffee, then flooding the world market in the 1990s. The fair trade minimum price means that when the world market price collapses, it is the non-fair trade farmers, particularly the poorest, who have to cut down their ...
The new currency was put into circulation in 2002 and the old currencies were phased out. Only three countries of the then 15 member states decided not to join the euro (the United Kingdom, Denmark and Sweden). In 2004 the EU undertook a major eastward enlargement, admitting 10 new member states (eight of which were former communist states).