overfishing

Introduction:

Many marine ecologists think that the biggest single threat to marine ecosystems today is overfishing. Our appetite for fish is exceeding the oceans' ecological limits with devastating impacts on marine ecosystems.
Scientists are warning that overfishing results in profound changes in our oceans, perhaps changing them forever. Not to mention our dinner plates, which in future may only feature fish and chips as a rare and expensive delicacy.

How to Sustainable fishery?
In order to prevent the exhaustion of fishery resources.
First, we need to have a reasonable way of fishing,  fishing plays an important role for the maintenance of the sustainable development of fisheries, for example, catch lobster, you can use small fishing boats and less impact on the environment, traditional trapping methods can better protect the surrounding environment and ecology.

Second, strengthen the concept of ecological farming, extensive advocacy activities in the majority of farmers and fishermen, to guide farmers to look at the problem from a long-term perspective and the perspective of sustainable development, and to consciously resist the damage to marine environment, and strengthen the concept of ecological farming, improve theirconsciousness of ecological farming and enthusiasm.
In my view ,Sustainable development of fisheries issues need to be multi-pronged and comprehensive management, enterprise innovation science and technology to improve fisheries resource use efficiency, reduce waste of fishery resources, a more rational use and development of fisheries resources, the government should implement some policies to ensure the sustainable development of fisheries and marine ecological balance.

Industrial Polluting Agriculture

How harmful is Genetic Engineering?

About food:
GE crops could produce new allergens in foods, which sensitive persons would not know to avoid. For instance, a gene for one of the many allergenic proteins found in milk might be transferred into vegetables such as carrots. A mother who knows better than to give her sensitive child milk would not realize that she needed to avoid GE carrots with the allergenic milk protein. This problem is unique to GE, because it alone can transfer proteins to completely unrelated species—often from organisms that have never been consumed as foods.

About medical treatment:
Most genetically engineered plant foods carry fully functioning antibiotic-resistance genes, which are used as "selectable markers" early in the engineering process, helping to select cells that have taken up the foreign genes. Such genes could have two harmful effects. First, eating these foods could reduce the effectiveness of antibiotics to fight disease if the antibiotics are taken at the same time as the foods. Second, the resistance genes could be transferred to human or animal pathogens, making them impervious to antibiotics—an effect that has already been demonstrated experimentally in the human digestive system.

Conclusion:China's arable land accounts for 7% of the world, have to feed accounted for 22% of the world's people, genetically modified foods to provide a lot of help. The dangers of genetically modified food has never eliminated, and hope that the government and entrepreneurs to take into account people's health problems in the use of transgenic technology.

The e-waste problem

The amount of electronic products discarded globally has skyrocketed recently, with 20-50 million tonnes generated every year. If such a huge figure is hard to imagine, think of it like this - if the estimated amount of e-waste generated every year would be put into containers on a train it would go once around the world.
The e-waste pollution

With the increase in the number of e-waste, the electronic pollution problem is more serious.E-waste is landfilled or incinerated, heavy metals penetrate the soil into rivers and groundwater, will result in the local soil and groundwater pollution, directly or indirectly, to the local residents and other biological damage; organics after incineration, releasing large amounts of harmful gases, such as the highly toxic dioxins, furans, polychlorinated biphenyls and other carcinogenic substances, the natural environment and human harm.

1. 

Electronic waste value
Bears significant business opportunities, "e-waste", the "dismantling" of the "electronic waste" containing gold, silver, copper, tin, chromium, platinum, palladium and other precious metals, will be an invaluable wealth.

Electronic waste contains metals, especially precious metals, its taste is several times of natural deposits or even hundreds of times, recovery costs are generally lower than the exploitation of natural deposits. For example, the old phone waste battery can extract 100g gold ordinary gold-bearing ore per ton can only extract 6g multi few tens of grams, can be said that the old phone is a very high-grade gold ore.So more and more driven by the interests of the company began recycling electronic waste, processed into the products they want.

Sea level rise

Preface:

Over the 20th century as a whole, sea levels rose by an average of around 1.7mm a year with evidence that in recent years the rate of rise has increased. Latest satellite data put the rise at around 3mm a year. The most recent IPCC assessment based on the most gloomy scenario puts predictions of 21st century sea level rise at between 26 and 59cm (10-23 inches). The influence of rising sea levels:

Accelerated sea level rise due to global warming, has been, or is about to become the coastal zone of major disasters. World in the past 100 years the mean sea level rise of 12 cm to about 100 years later, around 2100, the sea level will rise by 1 meter. If you do not take precautions, we must first submerged large tracts of land and many of the coastal cities.

Some low-lying island countries in the South Pacific and the Indian Ocean will be in the semi-submerged state. While the Maldives about to disappear, because the altitude of the island ground all in between 1 to 2 meters.

greenhouse effect

How to produce the greenhouse effect?
The reason is human in nearly a century the use of fossil fuels such as coal, oil, etc.), a large amount of CO2 emissions and so on many kinds of greenhouse gases. Because these greenhouse gases to the shortwave radiation from the sun has high permeability, and on the earth reflected long wave radiation are highly absorbent, also is often said that the greenhouse effect ", leading to global warming.

Nuclear energy

what is nuclear energy?

Use nuclear reactor in the nuclear fission releases heat energy for power generation mode. It is very similar with thermal power. Only in nuclear reactor and nuclear power station steam generator instead of thermal power boiler, nuclear fission can substitute for fossil fuel chemical energy.Nuclear energy is a good substitute for fossil fuel, it than fossil fuels more efficient, more environmental protection. Nuclear energy is sustainable development,
it is estimated that the main fuel of the nuclear fission of uranium and thorium reserves in the world, about 4.9 million tons and 275 million tons respectively. These fission fuel enough to be used in the era of fusion energy. Light fusion fuel is deuterium and lithium, 1 liter of seawater can extract 30 milligrams of deuterium in a fusion reaction to produce approximately equal to 300 liters of gasoline energy, 1 liter of seawater equivalent to about 300 liters of gasoline, Earth Shanghai water 40 more than one million tons of deuterium, enough billions of years of human use.

Location and Climate of Singapore

where is singapore?


Singapore is located in north latitude 1 ° 18 ',east longitude 103 ° 51 ',Next to the south exit of the Straits of Malacca, north across the narrow Straits of Johor and Malaysia immediately and two causeway connected Johor Bahru, Malaysia and Zhenlin Mountain, south across the Singapore Strait printed Batam sea. Singapore's total land area of ​​about 714.3 square kilometers, the country from the island of Singapore, Jurong Island, Pulau Ubin, Deguang Island, St. John's Island and Kusu Island over 60 islands and a coastline of 200 kilometers.

Climate of SingaporeMany people think the first impression is the rainy and hot climate in Singapore.Singapore is located in the area of tropical rainforest climate, hot and humid climate throughout the year, a small temperature difference between day and night, and the average annual temperature is between 23 to 34 'C, the average annual rainfall of about 2,400 mm, relative humidity between 65% to 90%.Moreover,the rainy season is from November to next March.Wet northeast monsoon, it rains every day.Usually the afternoon thunderstorms, the average low temperature hovering around 24 to 25 'C.Southwest monsoon from June to September is very dry. The temperature in April，May and October ,November is much hotter than other months.