Energy is critical to life. However, we must work to find solution to source sustainable energy which compliments the UK’s emission targets. This article discusses six interesting facts concerning the UK’s diversified energy supply system and the ways it is shifting towards decarbonised alternatives.
1. In 2015, UK government announced plans to close unabated coal-fired power plants by 2025.
A coal-fired power plant
In recent years, energy generation from coal has dropped significantly. In March 2018, Eggborough power station, North Yorkshire, closed, leaving only seven coal power plants operational in the UK. In May this year, Britain set a record by going one week without coal power. This was the first time since 1882!
2. Over 40% of the UK’s electricity supply comes from gas.
A natural oil and gas production in sea
While it may be a fossil fuel, natural gas releases less carbon dioxide emissions compared to that of coal and oil upon combustion. However, without mechanisms in place to capture and store said carbon dioxide it is still a carbon intensive energy source.
3. Nuclear power accounts for approximately 8% of UK energy supply.
Nuclear power generation is considered a low-carbon process. In 2025, Hinkley Point C nuclear power-plant is scheduled to open in Somerset. With an electricity generation capacity of 3.2GW, it is considerably bigger than a typical power-plant.
In 2018, the total installed capacity of UK renewables increased by 9.7% from the previous year. Out of this, wind power, solar power and plant biomass accounted for 89%.
4. The Irish Sea is home to the world’s largest wind farm, Walney Extension.
The Walney offshore wind farm.
In addition to this, the UK has the third highest total installed wind capacity across Europe. The World Energy Council define an ‘ideal’ wind farm as one which experiences wind speed of over 6.9 metres per second at a height of 80m above ground. As can be seen in the image below, at 100m, the UK is well suited for wind production.
5. Solar power accounted for 29.5% of total renewable electricity capacity in 2018.
This was an increase of 12% from the previous year (2017) and the highest amount to date! Such growth in solar power can be attributed to considerable technology cost reductions and greater average sunlight hours, which increased by up to 0.6 hours per day in 2018.
Currently, the intermittent availability of both solar and wind energy means that fossil fuel reserves are required to balance supply and demand as they can run continuously and are easier to control.
6. In 2018, total UK electricity generation from bioenergy accounted for approximately 32% of all renewable generation.
A biofuel plant in Germany.
This was the largest share of renewable generation per source and increased by 12% from the previous year. As a result of Lynemouth power station, Northumberland, and another unit at Drax, Yorkshire, being converted from fossil fuels to biomass, there was a large increase in plant biomass capacity from 2017.
Clean and fresh water is essential for human life, and water is a necessity to agricultural and other industries. However, global population growth and pollution from industrial waste has put a strain in local fresh water resources.
A hydrogel is made up of polymer chains that are hydrophilic (attracted to water) and are known for being highly absorbent.
Current clean-up costs can be extremely expensive, leaving poorer and more remote populations at risk to exposure of metal pollutants such as lead, mercury, cadmium and copper, which can lead to severe effects on the neurological, reproductive and immune systems.
Now, a group of scientists at the University of Texas at Dallas, US, have developed a 3D printable hydrogel that is capable of 95% metal removal within 30 minutes.
Clean water is also needed for one’s hygiene, including brushing your teeth and bathing.
The hydrogel is made from a cheap, abundant biopolymer chitosan and diacrylated pluronic, which forms cDAP. The cDAP mixture is then loaded into the printer as a liquid and allowed to cool to <4⁰C, before rising again to room temperature to form a gel that can be used to produce various 3D printed shapes.
The Dallas team also tested the reusability of their hydrogel and found that it had a recovery rate of 98% after five cycles of use, proving it to be a potentially reliable resource to communities with limited fresh water supply.
Life without clean water. Video: charitywater
‘This novel and cost-effective approach to remove health and environmental hazards could be useful for fabricating cheap and safe water filtration devices on site in polluted areas without the need for industrial scale manufacturing tools,’ the paper reads.
Throughout the series, you will be introduced to its members through regular features that highlight their roles and major interests in energy. We welcome you to read their series and hope to spark some interesting conversation across all areas of SCI.
The burning of fossil fuels is the biggest contributor to global greenhouse gas emissions.
According to the National Oceanic and Atmospheric Administration (NOAA), by the end of 2018, their observatory at Muana Loa, Hawaii, recorded the fourth-highest annual growth of global CO2 emissions the world has seen in the last 60 years.
Adding even more concern, the Met Office confirmed that this trend is likely to continue and that the annual rise in 2019 could potentially be larger than that seen in the previous two years.
Forecast global CO2 concentration against previous years. Source: Met Office and contains public sector information licensed under the Open Government Licence v1.0.
Large concentrations of CO2 in the atmosphere are a major concern because it is a greenhouse gas. Greenhouse gases absorb infrared radiation from solar energy from the sun and less is emitted back into space. Because the influx of radiation is greater than the outflux, the globe is warmed as a consequence.
Although CO2 emissions can occur naturally through biological processes, the biggest contributor to said emissions is human activities, such as fossil fuel burning and cement production.
Increase of CO2 emissions before and after the Industrial Era. Source: IPCC, AR5 Synthesis Report: Climate Change 2014, Fig. 1.05-01, Page. 3
Weather impacts from climate change include drought and flooding, as well as a noticeable increase in natural disasters.
This warming has resulted in changes to our climate system which has created severe weather impacts that increase human vulnerability. One example of this is the European heat wave and drought which struck in 2003.
The event resulted in an estimated death toll of over 30,000 lives and is recognised as one of the top 10 deadliest natural disasters across Europe within the last century.
In 2015, in an attempt to address this issue, 195 nations from across the globe united to adopt the Paris Agreement which seeks to maintain a global temperature rise of well below 2C, with efforts to limit it even further to 1.5C.
The Paris Climate Change Agreement explained. Video: The Daily Conversation
In their latest special report, the Intergovernmental Panel on Climate Change (IPCC) explained that this would require significant changes in energy, land, infrastructure and industrial systems, all within a rapid timeframe.
In addition, the recently published Emissions Gap report urged that it is crucial that global emissions peak by 2020 if we are to succeed in meeting this ambitious target.
Are we further away then we think?
As well as the Paris Agreement, the UK is committed to the Climate Change Act (2008) which seeks to reduce greenhouse gas emissions by at least 80% by 2050 relative to 1990 baseline levels. Since 1990, the UK has cut emissions by over 40%, while the economy has grown by 72%.
To ensure that we meet our 2050 target, the government has implemented Carbon Budgets, which limit the legal emissions of greenhouse gases within the UK across a five-year period. Currently, these budgets run up to 2032 and the UK is now in the third budget period (2018-2022).
The UK has committed to end the sale of all new petrol and diesel cars by 2040.
At present, the UK is on track to outperform both the second and third budget. However, it is not on track to achieve the fourth budget target (2023-2027). To be able to meet this, the Committee on Climate Change (CCC) urge that UK emissions must be reduced annually by at least 3% from this point forward.
We may not be sure which technologies will allow such great emission reductions, but one thing is for certain – decarbonisation is essential, and it must happen now!
The UK’s efforts to move towards clean energy can be seen around the UK, whether it’s the wind turbines across the hills of the countryside or solar panels on the roofs of city skyscrapers. There is, however, a technology that most people will never see, and it is set to be one of the biggest breakthroughs in a low-carbon economy yet.
Deep in the North Sea are miles of offshore pipelines, once used to transport natural gas to the UK. The pipelines all lead to a hub called the St Fergus Gas Terminal – a gas sweetening plant used by industry – that sits on the coast of north-east Scotland.
St Fergus Gas Terminal in North-East Scotland.
This network has now been reimagined as a low-cost, full-chain carbon capture, transport and offshore storage that will provide the UK will a viable solution to permanent carbon capture and storage (CCS) called the Acorn project.
CCS is a process that takes waste CO2 produced by large-scale, usually industrial, processes and transports it to a storage facility. The site, likely to be underground, stops the waste CO2 from being released into the atmosphere, storing it for later use for another purpose, such as the production of chemicals for coatings, adhesives or jet fuel.
Carbon Capture Explained | How It Happens. Video: The New York Times
High levels of CO2 in the atmosphere have been linked to global warming and the damaging effects of climate change, and CCS is one of the only proven solutions to decarbonisation that industry can currently access.
Taking advantage of existing infrastructure means that the Acorn project is running at a much lower cost and risk to comparable projects and is expected to be up and running by 2023. It is hoped the project will bring competitiveness and job retention and creation across the UK, particularly in the industrial centres of Scotland.
The concept of a hydrogen economy is not new to anyone involved or familiar with the energy sector. Until the 1970s, hydrogen was a well-established source of energy in the UK, making up 50% of gas used. For several reasons, the sector moved on, and a recent renewed interest into the advantages of hydrogen has put the gas at the forefront in the search for green energy.
Confidence behind the viability of hydrogen was confirmed last October when the government announced a £20m Hydrogen Supply programme that aims to lower the price of low carbon hydrogen to encourage its use in industry, power, buildings, and transport.
Hydrogen - the Fuel of the Future? Video: Real Engineering
‘In a way, hydrogen is more relevant than ever, because in the past hydrogen was linked with transportation,’ UCL fuel cell researcher Professor Dan Brett explained to The Engineer. ‘But now with the huge uptake of renewables and the need for grid-scale energy storage to stabilise the energy system, hydrogen can have a real role to play, and what’s interesting about that […] is that there’s a number of things you can do with it.
‘You can turn it back into electricity, you can put it into vehicles or you can do a power-to-gas arrangement where you pump it into the gas grid.’
The US’ environment agency and Clean Water Act is in trouble. Image: Public Domain Pictures
Budget proposals will slash the US Environmental Protection Agency’s funding by almost a third, and its workforce by 20%, quite apart from a major refocusing of its agenda. The new EPA administrator Scott Pruitt – whose time as attorney general in Oklahoma was notable for its opposition to environmental measures and the filing of multiple lawsuits against EPA – has certainly hit the ground running.
In contrast to Trump, Pruitt is actually getting stuff done, often going over the heads of his own staff. Planned regulations such as the chemical accident safety rule and a rule covering methane leaks from oil and gas wells have been delayed. Others have been reversed, including a ban on the neurotoxic pesticide chlorpyrifos, flying in the face of scientific advice from his own agency.
Trump faced harsh criticism from several nations after pulling out of the Paris Agreement. Image: Gage Skidmore@Flickr
Other moves come in response to executive orders from the president. Trump’s earlier criticism of Obama’s use of executive orders hasn’t stopped him from throwing them around like confetti – in his first 100 days, he signed almost as many as Obama averaged in a year.
For example, at the end of February, he signed one requiring a review of the Waters of the United States (WOTUS) rule, which defines what constitutes navigable waters. This might sound obscure, but it led to the EPA announcing at the end of June that it will rescind the 2015 Clean Water Rule.
‘WOTUS provided clarity on what bodies of water are subject to protections under the Clean Water Act,’ said Massachusetts congressman Mike Capuano. Essentially, the 2015 definition extended its scope to bring small waterways such as wetlands and streams under federal environmental rules, and not just big rivers and lakes.
‘The federal government won’t have the authority to regulate pollution in certain waterways because they don’t qualify under the EPA’s new definition,’ Capuano continued. ‘This will surely impact drinking water in many communities all across the country, since 117m Americans currently get their drinking water from small streams.’
EPA even published a press release that featured multiple quotes from Republican governors, senators and representatives across the country supporting the move. Quotes from those like Capuano – who believe it is a step backwards in water safety – were notable by their absence.
Seven US scientific societies wrote to Trump condemning his actions. Image: Max Pixel
So is mention of any scientific rationale. A letter from US scientists, drafted by conservation group American Rivers, states that the Clean Water Rule was developed using the best available, peer-reviewed science to clarify which bodies of water are, and are not, protected under the act. Importantly, it says that tributaries, intermittent streams and waters adjacent to them such as wetlands, are protected because of their physical, chemical and biological connections to navigable waterways. ‘We are disappointed that the current Administration has proposed dismantling the Rule with minimal consultation and without scientific justification,’ it says.
Much has been made of Trump’s withdrawal from the Paris Climate Agreement, but that’s not the only signal that the air in the US is set to get dirtier. An executive order on energy independence signed by Trump at the end of March 2017 led to an instant response from EPA that it would review the Clean Power Plan. The order asked the various agencies to submit plans to revise or rescind regulatory barriers that impede progress towards energy independence, as well as wiping out several of Obama’s executive orders and policies in the field of climate change.
Experts are worried that US air and water will become dirtier. The country is already the second biggest contributor to climate change in the world. Image: Pixabay
Top of the list for a potential resurgence: dirty energy. EPA has been directed to review, revise and rescind regulations that ‘may place unnecessary, costly burdens on coal-fired electric utilities, coal miners, and oil and gas producers’.
‘Our EPA puts America first,’ claimed Pruitt. ‘President Trump has a clear vision to create jobs, and his vision is completely compatible with a clean and healthy environment. By taking these actions today, the EPA is returning the agency to its core mission of protecting public health, while also being pro-energy independence.’
Many others beg to differ, including New Jersey senator Cory Booker. ‘It’s simply shameful that President Trump continues to put the interests of corporate polluters ahead of the health and safety of New Jersey families,’ he said. ‘The Administration’s repeated denial of clear science and proposed gutting of the EPA jeopardises the welfare of all Americans.
‘Under no circumstance should we allow the fundamental right of each and every American to live in a safe and healthy environment be undermined by such destructive and irresponsible policies.’