Monthly focus

Sustainable cities

01 August 2019

More than half the world’s population lives in cities, making them focal points for cutting emissions and resource-use. Image credit - Unsplash/ Jurriaan Snikkers, licensed under Unsplash license

In August, Horizon takes a look at the quest to make Europe’s cities environmentally sustainable, while also ensuring a healthy and prosperous population. We speak to geographer Professor Harriet Bulkeley on why cities have such an important role in fighting climate change, what it means for a city to be sustainable and the big challenges that lie ahead. We look at the construction of zero-energy housing, homing in on the case of Nottingham, UK, and find out how scientists are putting nature back into the old Spanish capital of Valladolid. We also talk to the city officials breathing new life into historical buildings in Bologna, Italy, and learn how urban planners and architects are taking emotional feedback into account when designing new public spaces and homes.

Reusing historical buildings for new purposes - an urban planning approach known as adaptive reuse - is breathing new life into cities like Bologna. Image credit - Flickr/ Yuri Virovets, licensed under CC BY 2.0

science in society | environment

28 August 2019

Plants and sensors are being used to help Bologna locals rediscover their city

Lining rundown historic areas of cities with plant life and smart sensors and reusing old buildings for new purposes are helping to breathe new life into Europe’s decaying urban spaces.

Integrating nature into cities can provide citizens with urban cooling, cleaner air, regulated water supplies and flood protection. Image credit - Max Pixel, licensed under CC0

environment

19 August 2019

Mobile forests could help cities cope with climate change

Cities across Europe are trialling schemes such as roof gardens and ‘mobile forests’ to embed more nature into urban areas in an effort to protect their citizens from climate change events like heatwaves, floods and droughts.

Retrofitting of houses on a large scale needs to start now to meet 2050 net zero energy target.Image credit - REMOURBAN

energy | environment

12 August 2019

‘Reverse fridges’ and insulated walls – how to make a house carbon neutral

As the world moves towards a carbon neutral future, many different areas from industry to manufacturing are working to reduce their emissions. But scientists are beginning to look at a different area – houses – to work out if it’s possible to reduce emissions from Europe’s homes to zero by retrofitting on a mass scale. And the early signs are promising.

Neurologists, architects, artists, and epidemiologists are collaborating to design cities that could be used to improve well-being among older people. Image credit - Senior Guidance, licensed under CCby2.0

health | ict | industry

06 August 2019

Emotional response to city design could guide urban planning

Virtual reality and scenario-testing models are being built to help urban planners and architects get real-time feedback about the impact of their designs on mental health, particularly for older people.

Focusing on 'boring emissions' rather than 'sexy' ones could do more to tackle climate change, says Prof. Bulkeley. Image credit - Prof. Harriet Bulkeley

interview | environment | policy

01 August 2019

People in cities hold the key to ensuring a sustainable future

Cities have a critical role to play in fighting climate change but hard conversations lie ahead about the best way to achieve the transition to sustainability, according to Harriet Bulkeley, professor of geography at Durham University, UK.

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CRISPR-Cas9 is a versatile gene editing system that exploits the way that bacterial immune systems defend against viruses. Image credit - Flickr/ NIH Image Gallery, image is in the public domain

Catching up with CRISPR

Seven years after scientists successfully managed to adapt a gene editing system used by bacteria into one that can be easily used in labs to edit human genes, we take a look at some of the emerging applications and ethical issues of CRISPR-Cas9. We talk to the head of the European Group on Ethics in Science and New Technologies about whether the simplicity and low cost of CRISPR means that there is potential for misuse and what should be done about this. We find out how scientists have used CRISPR to create cows lacking two sugars that trigger the human immune system, leading to hopes of longer-lasting heart valves for transplant patients and healthier red meat. And we speak to researchers who are using CRISPR to improve other gene editing technologies.

Exoplanets

On December 17th, the European Space Agency’s CHEOPS telescope will blast into space to take a closer look at some of the potentially habitable planets we’ve found beyond our solar system. Ahead of its launch, Horizon takes an in-depth look at what we already know about such exoplanets and what’s still to learn. We speak to Dr Michaël Gillon, who in 2017 was instrumental in discovering a system of seven Earth-like planets outside our solar system, about the diversity of the thousands of exoplanets we’ve found so far and next steps for research. We talk to scientists who are trying to understand the structure of Super-Earths – planets up to 10 times the size of Earth – by recreating elements of planetary cores in their labs, and others who are trying to understand how different planetary systems formed in the first place. Finally, we delve into one of the most important conditions for life to exist on exoplanets – their atmospheres – and find out how scientists are trying detect the biosignature gases that indicate the presence of life.

Genetically engineered mutations in cows could pave the way for transplant patients to receive whole animal organs in the future. Image credit - Pexels/Kat Jayne, licensed under Pexels license

Genetically engineered animals offer fresh hope to heart valve patients

Scientists have cloned a genetically engineered bull which they hope will help heart valve transplant patients lead better quality lives and benefit people with red meat allergies.

In the early Bronze Age, there was an infusion of a different genetic makeup in Europe whose origin ancient DNA experts are trying to explain. Image credit - geograph/David Dixon, licensed under CC BY-SA 2.0

How did the plague reshape Bronze Age Europe?

Europe changed dramatically during the Bronze Age, with huge population shifts generally ascribed to the rise of new metal technologies, trading and climate change. But scientists believe that there may have been another reason for this social upheaval – the plague, possibly transported by, or on the back of, newly domesticated horses.

Sustainable cities

Republish this content

Plants and sensors are being used to help Bologna locals rediscover their city

Mobile forests could help cities cope with climate change

‘Reverse fridges’ and insulated walls – how to make a house carbon neutral

Emotional response to city design could guide urban planning