Renewables Generate More Electricity Than Fossil Fuels in UK for First Time
By Simon Evans
During the three months of July, August and September, renewables generated an estimated total of 29.5 terawatt hours (TWh), compared with just 29.1TWh from fossil fuels, the analysis shows.
This is the first-ever quarter where renewables outpaced fossil fuels since the UK's first public electricity generating station opened in 1882. It is another symbolic milestone in the stunning transformation of the UK's electricity system over the past decade.
Nevertheless, a lack of progress in other parts of the economy means the UK remains far off track against its upcoming legally-binding carbon targets, let alone the recently adopted goal of net-zero greenhouse gas emissions by 2050.
At the start of this decade in 2010, the 288TWh generated from fossil fuels accounted for around three-quarters of the UK total. It was also more than 10 times as much electricity as the 26TWh that came from renewables.
Since then, electricity generation from renewable sources has more than quadrupled – and demand has fallen – leaving fossil fuels with a shrinking share of the total.
This shift is shown in the chart below, with the declining quarterly output from power stations burning coal, oil and gas in blue and rising generation from renewables in red.
(The quarterly chart also reflects the seasons, with demand higher in winter and lower in summer. Wind farm output is well matched with this cycle, as it tends to be windier in winter.)
Quarterly electricity generation in the UK between 2009 and the third quarter of 2019, in terawatt hours, with fossil-fuel output shown with a blue line (coal, oil and gas) and renewables shown in red (wind, biomass, solar and hydro). Source: BEIS Energy Trends and Carbon Brief analysis of data from BM Reports. Chart by Carbon Brief using Highcharts
Gas now contributes the vast majority of that shrinking total, as coal plants close down ahead of a planned phaseout in 2025. These ageing power stations were mostly built in the 1960s and 70s and are increasingly uneconomic to run due to CO2 prices, market forces and pollution rules.
In the third quarter of 2019, some 39 percent of UK electricity generation was from coal, oil and gas, including 38% from gas and less than 1 percent from coal and oil combined.
Another 40 percent came from renewables, including 20 percent from wind, 12 percent from biomass and 6 percent from solar. Nuclear contributed most of the remainder, generating 19 percent of the total.
While it is unlikely that renewables will generate more electricity than fossil fuels during the full year of 2019, it is now a question of when – rather than if – this further milestone will be passed.
This summer, National Grid predicted that zero-carbon sources of electricity – wind, nuclear, solar and hydro, but not biomass – would generate more electricity than fossil fuels during 2019. Carbon Brief's analysis through to the third quarter of the year is in line with this forecast.
Over the past year, the most significant reason for rising renewable generation has been an increase in capacity as new offshore wind farms have opened. The 1,200 megawatt (MW) Hornsea One project was completed in October, becoming the world's largest offshore wind farm. The 588MW Beatrice offshore wind farm was completed in Q2 of this year.
These schemes add to the more than 2,100MW of offshore capacity that started operating during 2018. Further capacity is already being built, including the 714MW East Anglia One project that started generating electricity this year and will be completed in 2020.
In total, government contracts for offshore wind will take capacity from nearly 8,500MW today to around 20,000MW by the mid-2020s. The government and industry are jointly aiming for at least 30,000MW of offshore wind capacity by 2030, with two further contract auctions already expected.
In September, the latest auction round produced record-low deals for offshore wind farms that will generate electricity more cheaply than expected market prices – and potentially below the cost of running existing gas plants.
Other contributors to the recent increase in renewable generation include the opening of the 420MW Lynemouth biomass plant in Northumberland last year and the addition of hundreds of megawatts of new onshore wind and solar farms. (Another new 299MW biomass plant being built on Teesside, with a scheduled opening in early 2020, is facing "major delays".)
According to the Department of Business, Energy and Industrial Strategy (BEIS), the rise in renewable output during the first half of 2019 was down to these increases in capacity, with weather conditions not unusual for the time of year.
Some two-thirds of electricity generated from biomass in the UK comes from "plant biomass", primarily wood pellets burnt at Lynemouth and the Drax plant in Yorkshire. The remainder comes from an array of smaller sites based on landfill gas, sewage gas or anaerobic digestion.
The Committee on Climate Change says the UK should "move away" from large-scale biomass power plants, once existing subsidy contracts for Drax and Lynemouth expire in 2027.
Using biomass to generate electricity is not zero-carbon and in some circumstances could lead to higher emissions than from fossil fuels. Moreover, there are more valuable uses for the world's limited supply of biomass feedstock, the CCC says, including carbon sequestration and hard-to-abate sectors with few alternatives.
In terms of fossil-fuel generating capacity, the UK's remaining coal plants are rapidly closing down, well ahead of a 2025 deadline to phase out unabated burning of the fuel. By March 2020, just four coal plants will remain in the UK.
Utility firms have plans to build up to 30,000MW of new gas capacity – including 3,600MW at Drax recently given government planning approval – despite the fact that government projections suggest only around 6,000MW might be needed by 2035.
It is unlikely that all of the planned new gas capacity will get built. The schemes are generally reliant on winning contracts under the UK's capacity market, which is designed to ensure electricity supply is always sufficient to meet demand.
The rise of renewables means that gas generation is likely to continue falling in the UK, whether or not this new capacity gets built. Nevertheless, the UK is unlikely to meet its legally binding goal of cutting overall emissions to net-zero by 2050, unless progress in the electricity sector is matched by reductions in other parts of the UK economy, such as heating and transport.
Carbon Brief's electricity-sector analysis shows that renewables are also estimated to have generated more electricity than fossil fuels during the individual months of August and September, the first time there have been two consecutive such months.
Previously, renewables beat fossil fuels in September 2018 – the first-ever whole month – and then again in March 2019. This means that there have only ever been four months where renewables outpaced fossil generation, of which three have been this year and two in the last two months.
This is shown in the chart, below, which also highlights the greater month-to-month variability in electricity generation and demand, which is overlaid on top of the broader seasonal cycles.
Monthly electricity generation in the UK between 2012 and the third quarter of 2019, in terawatt hours, with fossil-fuel output shown with a blue line (coal, oil and gas) and renewables shown in red (wind, biomass, solar and hydro). Source: Carbon Brief analysis of data from BEIS Energy Trends and BM Reports. Chart by Carbon Brief using Highcharts
In the first three quarters of 2019, renewables outpaced fossil fuels on 103 of the 273 individual days, Carbon Brief analysis suggests. This is more than one-third of the days in the year so far and includes 40 of the 91 days in the third quarter of 2019.
(Although this is not a majority of days, the aggregate output during the quarter was higher for renewables. This is because their excess over fossil fuels was large on some days.)
As expected from the monthly aggregates in the chart, above, these days with higher renewable generation are concentrated in March and the third quarter of 2019, as shown in the chart, below.
Daily electricity generation in the UK during the first three quarters of 2019, in terawatt hours, with fossil-fuel output shown with a blue line (coal, oil and gas) and renewables shown in red (wind, biomass, solar and hydro). Source: Carbon Brief analysis of data from BEIS Energy Trends and BM Reports. Chart by Carbon Brief using Highcharts.
The total of 103 days with higher renewable electricity generation than from fossil fuels in the first three quarters of the year is far in excess of the 67 such days by the same point in 2018.
This is shown in the chart, below, which also highlights the fact that there had never been any days with higher renewable generation until 2015.
Cumulative count of days each year when electricity generation from renewables was higher than that from fossil fuels. Prior to 2015 there were no days when renewables outpaced fossil fuels. Source: Carbon Brief analysis of data from BEIS Energy Trends and BM Reports. Chart by Carbon Brief using Highcharts.
There have already been nearly as many higher renewable days in the first three quarters of 2019, at 103, as there were in the whole of 2018, which saw 107 such days. There were only 58 such days in 2017, just 16 in 2016 and 12 in 2015. The first ever day when UK renewables generated more electricity than fossil fuels was 11 April 2015.
The figures in the article are from Carbon Brief analysis of data from BEIS Energy Trends chapter 5 and chapter 6, as well as from BM Reports. The figures from BM Reports are for electricity supplied to the grid in Great Britain only and are adjusted to include Northern Ireland.
In Carbon Brief's analysis, the BM Reports numbers are also adjusted to account for electricity used by power plants on site and for generation by plants not connected to the high-voltage national grid. This includes many onshore wind farms, as well as industrial gas combined heat and power plants and those burning landfill gas, waste or sewage gas.
By design, the Carbon Brief analysis is intended to align as closely as possible to the official government figures on electricity generated in the UK, reported in BEIS Energy Trends table 5.1. Briefly, the raw data for each fuel is adjusted with a multiplier, derived from the ratio between the reported BEIS numbers and unadjusted figures for previous quarters.
Carbon Brief's method of analysis has been verified against published BEIS figures using "hindcasting". This shows the estimates for total electricity generation from fossil fuels or renewables to have been within ±3% of the BEIS number in each quarter since Q4 2017. (Data before then is not sufficient to carry out the Carbon Brief analysis.)
For example, in the second quarter of 2019, a Carbon Brief hindcast estimates gas generation at 33.1TWh, whereas the published BEIS figure was 34.0TWh. Similarly, it produces an estimate of 27.4TWh for renewables, against a BEIS figure of 27.1TWh.
The Carbon Brief estimated totals for fossil fuels and renewables are very close in Q3 2019, coming within 0.5TWh of each other. This means that despite the relatively low level of uncertainty in the estimates, their relative position could be reversed in the official BEIS data.
This serves to emphasize the fact that the broader trend of decline for fossil fuels and an increase for renewables is of far greater significance than the precise figures for any individual quarter.
In contrast to Carbon Brief's analysis, figures published by consultancy EnAppSys for the third quarter of 2019 suggest that fossil fuels generated slightly more electricity than renewables. There are several reasons for this difference.
First, the company's analysis is for Great Britain only, whereas Carbon Brief's covers the UK overall. Second, it reports on electricity "supplied" in the country, including imports, whereas Carbon Brief estimates the amount of electricity "generated" within the UK only.
Third, Carbon Brief's analysis is, by design, aligned with the quarterly BEIS Energy Trends data for electricity generation, whereas EnAppSys uses its own approach.
For comparison, EnAppSys reported for the second quarter of 2019 that 28.3TWh was supplied in GB from gas, whereas BEIS reports that 34.0TWh was generated in the UK. Similarly EnAppSys reported 23.1TWh coming from renewables, against a BEIS figure of 27.1TWh.
Reposted with permission from our media associate Carbon Brief.
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By Dr. Kate Raynes-Goldie
Of all the plastic we've ever produced, only 9% has been recycled. So what happened to all that plastic you've put in the recycling bin over the years?
Triangle of Mistruths<p>The myth created around plastic recycling has been one of simplicity. We look for the familiar triangle arrows, then pop the waste in the recycling bin so it can be reused.</p><p>But the true purpose of those triangles has been misunderstood by the general public ever since their invention in the 1980s.</p><p>These triangles were actually created by the plastics industry and, according to a report provided to them in July 1993, <a href="https://www.npr.org/transcripts/912150085" target="_blank">were creating "unrealistic expectations"</a> about what could be recycled. But they decided to keep using the codes.</p><p>Which is why many people still believe that these triangular symbols (also known as a <a href="https://sustainablepackaging.org/101-resin-identification-codes/" target="_blank" rel="noopener noreferrer">resin identifier code</a> or RIC) means something is recyclable.</p><p>But according to the American Society for Testing and Materials International (ASTM) – which controls the RIC system – the numbered triangles "<a href="https://www.astm.org/Standards/D7611.htm" target="_blank" rel="noopener noreferrer">are not recycle codes</a>." In fact, they weren't created for the general public at all. They were made for the post-consumer plastic industry.</p><p>In other words, the symbols make it easier to sort the different types of plastics, some of which cannot be recycled – <a href="https://www.ecobin.com.au/understand-recycling-codes/" target="_blank" rel="noopener noreferrer">depending on the recycling facility</a>.</p><p>"Unfortunately, just placing your plastic into the recycling bin doesn't mean it will get recycled," says Lara Camilla Pinho. She is an architect and lecturer at the UWA School of Design who is researching novel uses of plastic waste.</p><p>"The recycling system is complicated and often dictated by market demand. Not all plastic is recyclable. We cannot recycle plastic bags or straws for example."</p>
Behind the Scenes<p>So, what makes recycling plastics so difficult?</p><p>"Essentially, there are two types of plastics – thermoplastics and thermosets. While thermoplastics can be re-melted and re-molded, thermosets contain cross-linked polymers that cannot be separated meaning they cannot be recycled," says Lara.</p><p>"Even thermoplastics have a limit to the amount of times we can recycle them, as each time they are recycled they downgrade in quality."</p><p>Even when plastics are recyclable, it is <a href="https://www.theguardian.com/environment/2019/oct/13/war-on-plastic-waste-faces-setback-as-cost-of-recycled-material-soars" target="_blank">often more costly</a> than simply making new plastics.</p>
Sugar, Seaweed and Mushrooms<p>If the conventional recycling system isn't working, what else can we do with all the plastic we've created?</p><p>Lara is looking for ways to add value to recycled plastics such as using it in the design and development of architectural products. She hopes to use these architectural products to help underserved communities that are disproportionately affected by plastic waste.</p><p>In addition to recycling, we also need to find ways to reduce our use of virgin petroleum-based plastics.</p><p>Bioplastic is one such product that has been getting a lot of hype over the last few years. And although they're better than petroleum-based plastics, bioplastics also come with their own <a href="https://phys.org/news/2017-12-truth-bioplastics.html" target="_blank">set of challenges</a>.</p><p>"There are already a lot of bio-based alternatives to plastic, such as bagasse – a byproduct of sugar cane processing," says Lara.</p><p><a href="https://blogs.scientificamerican.com/observations/the-mycelium-revolution-is-upon-us/" target="_blank" rel="noopener noreferrer">Mycelium</a>, a type of fungi we most often associate with mushrooms, are also providing an interesting plastic alternative.</p><p>"In the field of architecture, mycelium is starting to be used as an alternative to plastic insulation, but also as compostable packaging and bricks," says Lara.</p><p>"The bricks take around five days to make and are strong, durable, water resistant and compostable at the end of their use."</p><p><a href="https://www.arup.com/news-and-events/hyfi-reinvents-the-brick" target="_blank" rel="noopener noreferrer">Hy-Fi Tower</a>, created by <a href="http://www.thelivingnewyork.com/living_about.html" target="_blank" rel="noopener noreferrer">The Living</a>, is an example of a building made from these bricks.</p><p>And finally, there's seaweed.</p><p>"[Seaweed is] cheap and can reproduce itself quickly without fertilizers. In architecture, there is use for seaweed as an alternative to plastic insulation but also as cladding," says Lara.</p>
More Money, More Problems<p>While all these alternatives are great, the main cause of our plastic dilemma is not scientific or technological, but economic.</p><p>As long as it remains <a href="https://engineering.mit.edu/engage/ask-an-engineer/why-is-it-cheaper-to-make-new-plastic-bottles-than-to-recycle-old-ones/" target="_blank">cheaper to create new plastics</a> from fossil fuels rather than from bioplastics or from recycling, we're going to be stuck with plastic garbage islands floating in our oceans.</p><p>The true cost to our health and our environment has yet to be included in the equation. But once it is, maybe that is when the real shift will happen.</p>
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Towards the end of the final presidential debate of the 2020 election season, the moderator asked both candidates how they would address both the climate crisis and job growth, leading to a nearly 12-minute discussion where Donald Trump did not acknowledge that the climate is changing and Joe Biden called the climate crisis an existential threat.
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By Zheng Chen and Darren H. S. Tan
As concern mounts over the impacts of climate change, many experts are calling for greater use of electricity as a substitute for fossil fuels. Powered by advancements in battery technology, the number of plug-in hybrid and electric vehicles on U.S. roads is increasing. And utilities are generating a growing share of their power from renewable fuels, supported by large-scale battery storage systems.