Below is a text with a chain of problems and solutions. Sometimes there is more than one problem at a time.
Fill in each gap with "problem" or "solution"
Environmental Studies
1
The UK is becoming more and more dependent on natural gas as a source of energy for industry and our homes. This situation causes more than one . The first is that natural gas releases carbon into the atmosphere. A more urgent is that we are running out of North Sea gas and will soon be dependent on imported supplies from Russia. This makes us politically and economically vulnerable. At any moment, they could decide to literally 'turn off the tap'. One to this is to invest in nuclear energy. This would solve the long-term dangers of greenhouse emissions. However, one with nuclear energy is that it is difficult to dispose of nuclear waste. A second is that nuclear power stations are vulnerable to terrorist attack. One suggested to this difficulty is to use hydrogen. This is a clean fuel, but the with this is that we are not yet able to produce hydrogen economically in commercial quantities. One that has been proposed is that we could make the hydrogen from natural gas, 'capture' the carbon before it is released into the atmosphere, then pipe the hydrogen round the country in the same way that we currently distribute natural gas. The with this is that it keeps us reliant on imported natural gas. One to this is to increase our current storage capacity for natural gas. A further is to use a wide range of suppliers. Realistically, however, this leaves us with the of being dependent on natural gas as a primary source of energy. Another is that huge capital investment will be required if we decide to go down the hydrogen route. The conclusion must be that there is no easy to the of finding a sustainable source of energy for the UK
