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Read the following text and answer question.

Importance of Aquaculture 

Aquaculture involves the art, science and business of breeding aquatic animals and plants in fresh or marine waters for human use. It also extends to the marketing of such organisms in a controlled environment. It is a kind of agriculture, and therefore, it requires inputs such as clean water and nutrients. It also requires storage for harvested produce, transportation and marketing facilities.

Inputs often depend on the species that are farmed. Species lower on the aquatic food chain usually require less input, as they feed on microorganisms and are fine in just clean water. More inputs like fish or fishmeal, cereals, or grains are required, as we get higher on the food chain with species like salmon or tuna.

All over the world, the demand for seafood has increased because people have learned that seafood as part of regular diets are healthier and help fight cardiovascular disease, cancer, Alzheimer’s and many other major illnesses.

Aquaculture will add to wild seafood, and make it _______ and accessible to all.

Aquaculture business provides tax and royalty revenue to local governments. Besides, there is also potential revenue from exports. 

(Adapted from: https://goo.gl/qcbcfY. Access: 01/25/2018)

The Pros and Cons of Nuclear Power

Since the disaster at the Fukushima nuclear power plant in Japan in 2011, a debate has been raging (1) the future of atomic energy. Consequently, the safety risks have been well publicized in the global media. But do the risks outweigh the damage that could be done to the planet because of our ongoing addiction to fossil fuels?

Even environmentalists don’t have the answer. They are split over nuclear (2) , and its pros and cons. Some say it is neither safe nor economical because it produces potentially (3) radioactive waste, and reactors are so costly to build. However, others believe nuclear energy is a necessary evil. They say we should continue using it until (4) energy sources, like wind turbines and solar panels, can meet global demand. Supporters also argue that nuclear energy helps cut down on carbon emissions from fossil fuels such as coal and natural gas, which are linked to global warming and pollute the environment. They say this is because nuclear reactors produce a tiny fraction of the carbon dioxide generated by burning coal.

But perhaps the biggest hurdle for atomic energy to overcome is its image problem. Despite industry claims of a strong safety record, critics remain unconvinced because each reactor annually produces up to 30 tons of nuclear waste, which can continue to be radioactive and hazardous for thousands of years. Furthermore, the Chernobyl disaster in 1986 left the public with vivid images of the impact of a nuclear meltdown, including deformed babies, mutated vegetables, and abandoned towns.

While nuclear reactors may continue to be installed in some countries for decades to come, after Fukushima others have decided to rethink their energy policies. For example, the German government has revealed plans for a “green” renewable energy plan, even though it has relied on nuclear power for up to 23 percent of its consumption in the past. It has been announced that all seventeen nuclear power plants would be phased out by 2022. The policy will also promote energy-saving measures encouraging people to insulate their homes, recycle, and reduce waste. Experts argue it could be a risky strategy because Germany doesn’t have natural gas or oil supplies, and coal supplies have been depleted.

Meanwhile, in Brazil, there is just one nuclear plant at Angra dos Reis. Nuclear power represents only three per cent of Brazil’s energy production. After sharp oil price rises in the 1970s, the country’s leaders anticipated future energy supply problems. So they concentrated on developing alternative energy sources including biofuel, hydroelectric schemes, and wind power. 

This approach seems to be working because by May 2012 plans to build more nuclear reactors were shelved by Brazilian officials. The move was welcomed by environmental lobby groups, which had feared a potential ecological catastrophe in case of an accident. If a big country like Brazil, which is the tenth largest energy consumer in the world, can survive and improve its economy without much nuclear power, maybe others can do so, too.