Pollution is increasing day by day and is not only the problem of devolving countries but also of developed countries all over the world.
Some recent innovations to deal with the pollution and climate change from the different corners of the world are as follows:
Air purifier tower
“Institute of Earth Environment at the Chinese Academy of Sciences, Xian in Shaanxi province, China” researchers build a 100meter high tower to beat air pollution. There the problem of smog is resolved by this air purifier tower which was a severe problem of big cities there.
The procedure of cleaning is as greenhouses covering about half the size of a soccer field around the base of the tower. Polluted air is sucked into the glasshouses and heated up by solar energy. The hot air then rises through the tower and passes through multiple layers of cleaning filters.
The head of the research, Cao Junji, said “improvements in air quality had been observed over an area of 10 square kilometres (3.86 square miles) in the city over the past few months and the tower has managed to produce more than 10 million cubic metres (353 million cubic feet) of clean air a day since its launch.”
Electricity from garbage
In Sweden More than 99% of all household waste is recycled in one way or another. Today, recycling stations are as a rule no more than 300 metres from any residential area. Most Swedes separate all recyclable waste in their homes and deposit it in special containers in their block of flats or drop it off at a recycling station.
Weine Wiqvist, CEO of the “Swedish Waste Management and Recycling Association” still thinks Swedes can do more, considering that about half of all household waste is burnt, that is, turned into energy. Waste is a relatively cheap fuel and Sweden has, over time, developed a large capacity and skill in efficient and profitable waste treatment. In 2014, Sweden even imported 2.7 million tonnes of waste from other countries.
The remaining ashes constitute 15% of the weight before burning. From the ashes, metals are separated and recycled, and the rest, such as porcelain and tile, which do not burn, is sifted to extract gravel that is used in road construction. About 1% still remains and is deposited in rubbish dumps. The smoke from incineration plants consists of 99.9% non-toxic carbon dioxide and water but is still filtered through dry filters and water. The dry filters are deposited. The sludge from the dirty filter water is used to refill abandoned mines.
Water filtration plants
A group of scientists in the U.K. reporting their findings in the Nature Nanotechnology journal, researchers from the University of Manchester have claimed that the process of desalination – filtering salt-water to produce fresh water – could lead to cheaper filtration systems in the developing world.
They explained that by controlling the size of the pores in the membranes the team was able to filter out common salts passing through the material.
"Realization of scalable membranes with uniform pore size down to atomic scale is a significant step forward and will open new possibilities for improving the efficiency of desalination technology," Rahul Nair, professor of material physics at the University of Manchester, said in a statement.
Previously researchers were unable to remove common salts using the graphing (wafer thin sheath of carbon) filtering technique, instead removing small nanoparticles and organic molecules.
Graphene was originally isolated in 2004 by Andre Geim and Konstantin Novoselov, both professors at the University of Manchester, who later won the Nobel Prize in Physics for their work.
By 2025 the UN expects that 14% of the world's population will be faced with water scarcity as a result of the damaging effects of climate change on water supplies.
Contributed by: Ramsha Iftikhar Mission Holder Positive Pakistan
(The author is Faisalabad-based blogger and student of Chemistry at Government College University, Faisalabad.)