by Nelson Daily Staff on Friday October 22 2010
Environmental News Network
The United Nations should impose a moratorium on "geo-engineering" projects such as artificial volcanoes and vast cloud-seeding schemes to fight climate change, green groups say, fearing they could harm nature and mankind.
The risks were too great because the impacts of manipulating nature on a vast scale were not fully known, the groups said at a major U.N. meeting in Japan aimed at combating increasing losses of plant and animal species.
Envoys from nearly 200 countries are gathered in Nagoya, Japan, to agree targets to fight the destruction of forests, rivers and coral reefs that provide resources and services central to livelihoods and economies.
A major cause for the rapid losses in nature is climate change, the United Nations says, raising the urgency for the world to do whatever it can to curb global warming and prevent extreme droughts, floods and rising sea levels.
Some of the geo-engineering schemes proposed include:
• Ocean fertilization. Large areas are sprinkled with iron or other nutrients to artificially spur growth of phytoplankton, which soak up carbon dioxide. But this could trigger harmful algal blooms, soak up nutrients and kill fish and other animals.
• Spray seawater into the atmosphere to increase the reflectivity and condensation of clouds so they bounce more sunlight back into space.
• Placing trillions of tiny solar reflectors out in space to cut the amount of sunlight reaching the Earth.
• Artificial volcanoes. Tiny sulfate particles or other materials are released into the stratosphere to reflect sunlight, simulating the effect of a major volcanic eruption.
Article continues: http://www.reuters.com/article/idUSTRE69K18320101021