May 29, 2010

Reforestation may lower the climate change

Norman, Okla.—Scientists at the University of Oklahoma and the Fudan University in Shanghai, China, have found that reforestation and afforestation — the creation of new forests — may lower the potential of forests for climate change lessening.
Yiqi Luo, professor of ecology in the OU College of Arts and Sciences Department of Botany and Microbiology, and Changzhang Liao, Bo Li and Changming Fang, professors of ecology in the Fudon University Department of Ecology and Evolutionary Biology, examined whether plantations have the same ecosystem carbon stock as natural forests.
By synthesizing 86 experimental studies between plantations and their natural forest counterparts, Luo and colleagues found plantations substantially reduce carbon stock in ecosystems in comparison with natural forests.

Contribution to environment, economy and food security

GENETICALLY Modified (GM) foods are derived from genetically modified organisms. Genetic modification involves the insertion or deletion of genes. GM crops are also known as biotech crops. The first commercially grown genetically modified crop is tomato (1994). Currently, there is a number of genetically modified food species. Some biotech crops alongwith their traits are: soyabean (herbicides tolerance, oil content), cotton (insect resistance), maize (herbicides, insects), canola (herbicides, fertility restored, oil content), rice (herbicides, insects, vitamin A, B1), wheat (herbicides), potato (insects and virus resistance), tomato and melon (delayed ripening), papaya, squash, sweet pepper and plum (virus resistance), linseed, sugar beets and alfalafa (herbicides tolerance), sugarcane (insecticides, high-sucrose), rose, petunia and carnation (modified flower colour), tobacco (herbicides tolerance, nicotine reduction).

May 28, 2010

Solutions of Arsenic groundwater poisoning in southern Asia

An estimated 60 million people in Bangladesh are exposed to unsafe levels of naturally occurring arsenic in their drinking water, dramatically raising their risk for cancer and other serious diseases, according to the World Health Organization (WHO). Because most of the contaminated water is near the surface, many people in Bangladesh have installed deep wells to tap into groundwater that’s relatively free of arsenic.
In recent years, however, farmers have begun using the deep, uncontaminated aquifers for irrigation – a practice that could compromise access to clean drinking water across the country, according to a report in the May 27 issue of the journal Science. The report is co-authored by groundwater experts Scott Fendorf (Stanford University), Holly A. Michael (University of Delaware) and Alexander van Geen (Columbia University).
“Every effort should be made to prevent irrigation by pumping from deeper aquifers that are low in arsenic,” the authors wrote. “This precious resource must be preserved for drinking.”

Saving electricity in Bangladesh

Bangladesh is now facing a serious crisis of "electricity shortage". Various measures are being taken to save electricity. However, if we take the following measures we can save a considerable amount of power:
1. BILLBOARDS - It has been observed that a large number of billboards in Dhaka city are using electric lights at night. This should be stopped immediately to conserve power.
2. SHOP SIGNBOARDS - A large number of shops keep their signboard lights on throughout the night, although the shops are now closed at 7:00 pm. All shopkeepers should be advised to put off the lights at 7:00pm.

May 23, 2010

How will it respond to predicted climate change?

KUAKATA, locally known as Sagar Kannya (daughter of the sea) is located in the southwest of Bangladesh. Next to Cox's Bazar it is the second most famous sea beach of this country. And Kuakata is one of the rarest sea beaches of the world, which has a rare scenic beauty offering the full view of the rising and setting of crimson sun in the water of the Bay of Bengal. This 30 km long and 03 km wide beach has a typical natural setting and sandy as gently sloping into the Bay of Bengal.
It is 70 km away from Patuakhali district headquarters and 320 km from the capital Dhaka. The sight is characterised by an excellent combination of eye-catching natural beauty, sandy beach, blue sky, huge expanse of water of the Bay and evergreen forest. The unique customs of the 'Rakhyne' tribal families and Buddhist temple of about hundred years old indicate the ancient tradition and cultural heritage in the area.
Kuakata is a unique example of co-occurrence of different ecosystems. There are remnants of mangroves in this beach. The line of coconut trees has increased the scenic beauty of this seashore. The nearby Fatra and Gangamati mangrove forests (part of Sundarbans) have enriched the biodiversity of this territory. The tamarisk (Jhou) forests have added more attraction to this beach.