German scientists claim CO2 can help crops grow faster

14:15, December 15, 2009      

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While global leaders gather in Copenhagen to discuss how to reduce greenhouse gas emissions, German scientists have discovered that carbon dioxide (CO2) from greenhouse gas can not only help crops grow faster, but also reduce water consumption.

A German government-subsidized agricultural science lab released the results Dec 14.

Researchers said in the past few years they planted barley, wheat and beet in experimental fields near the city of Braunschweig, Germany. They released CO2 on the crops and observed the changes in crop growth.

They found that when they release a special mixture of air, with a concentration of 550 ppm, to the crops they yield an average of 10 percent to 15 percent more.

Meanwhile, the vapor let in the air by the crops decreased from 5 percent to 20 percent, which means the crops absorbed less water from the soil.

Scientists concluded that the higher concentration of CO2 in the air the crops are exposed to, the more efficiently they will absorb water.

Scientists said they hope the finding will provide reference to the underway climate talks.

It is generally believed that the increase of greenhouse gas in the air is the main reason resulting in global warming.

By People's Daily Online
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