{"id":1949,"date":"2022-01-21T13:03:43","date_gmt":"2022-01-21T13:03:43","guid":{"rendered":"https:\/\/horizon.peachpuff-wolverine-566518.hostingersite.com\/?p=1949"},"modified":"2022-01-21T13:03:43","modified_gmt":"2022-01-21T13:03:43","slug":"to-feed-a-growing-population-farmers-look-to-the-sun","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/horizon\/1949\/to-feed-a-growing-population-farmers-look-to-the-sun\/","title":{"rendered":"To feed a growing population, farmers look to the Sun"},"content":{"rendered":"

Power above, crops below. What a bright idea! Researchers are testing the effectiveness of growing crops under solar panels.<\/strong><\/p>\n

A mix of aromatic herbs and flowers is being grown at a photovoltaic park on mainland Greece. In Spain, artichoke and broccoli are sharing fields with solar panels. In Belgium, panels have been installed right on top of pear trees and sugar beets.<\/p>\n

These are examples of agrivoltaics \u2013 a new sustainable solution that is gaining ground. Pilot projects are popping up across Europe to shed light on how harvesting sunshine on farms could be a win-win for agriculture, especially small-scale farmers looking for ways to boost yields while using less energy and water.<\/p>\n

According to the United Nations, the\u00a0water-food-energy nexus<\/a>\u00a0is key to our societies being able to develop sustainably. Demand for all three is increasing, driven by a rising global population, rapid urbanisation, changing diets and economic growth. The United Nation\u2019s data also reveals that the largest consumer of the world\u2019s freshwater resources is now agriculture, and more than one-quarter of the energy used globally is expended on food production and supply.<\/p>\n

The world will be home to an astonishing 10 billion people in the next 30 years. Not only is that a lot of people, it\u2019s also a lot of mouths to feed \u2013 far too many for today\u2019s farms to satisfy. In fact, feeding this future population will require that we somehow produce twice as much food as we do today \u2013 a proposition that is rife with challenges.<\/p>\n

First, there\u2019s the challenge of where to grow more crops. Out of the 13 billion hectares of land on this planet, only 38% is available for farming. Increasing that area would likely mean turning forests \u2013 including rainforests \u2013 into cropland, resulting in a major loss of biodiversity. And because trees play an essential role in fighting climate change, such deforestation would also lead to an increase in greenhouse gas emissions.<\/p>\n

On top of deforestation there\u2019s also the challenge of pollution, with agriculture being responsible for at least 10% of the world\u2019s greenhouse gas emissions. These largely result from methane produced by livestock, the sector\u2019s use of nitrogen-based fertilisers (which cause nitrous oxide, a potent greenhouse gas, 300 times more powerful than carbon dioxide), and fossil fuel dependent farm machinery and transport.<\/p>\n

Agrivoltaics could be the answer<\/strong><\/p>\n

Despite the EU\u2019s target to produce 30% of its energy from renewables by 2030, nearly every stage of food production currently relies on gas and oil. That being the case, any increase in food production would most certainly mean an increase in fossil fuel use and, as a result, greenhouse gas emissions.<\/p>\n

Agrivoltaics could be the answer. Considering that crops need sunlight to grow, farms can use the sunshine to power their production processes. Afterall, farm fields tend to be large open spaces that are exposed to a lot of sunlight. So why not install solar panels?<\/p>\n

\u2018Unfortunately, solar panels take up space,\u2019 answered Ilse Lenaerts, who manages the science, engineering and technology facility\u00a0TRANSfarm<\/a>\u00a0which supports KU Leuven research groups. \u2018As this space can no longer be used to grow crops, they can decrease a farm\u2019s overall yield.\u2019<\/p>\n

But all is not lost. \u2018Agrivoltaics aim to allow food production to continue on the same land used for solar panels,\u2019 explained Lenaerts.<\/p>\n

With the support of the\u00a0HyPErFarm<\/a>\u00a0project, the KU Leuven team is working to advance the use of agrivoltaics, turning it from an innovative concept into a viable market solution. \u2018We want to make an indisputable business case for why farmers should produce and use renewable energy on their farms, and why agrivoltaics is the best way of doing this,\u2019 she said.<\/p>\n

As for the production component, the project has developed a unique technique for installing solar panels in farm fields. Instead of placing the panels on the ground, HyPErFarm installs them above the crops, as a canopy of sorts, or aside to the crops, as a protective windshield.<\/p>\n

\u2018By placing the solar panels over the crops, no farmland is lost, meaning solar energy can be produced without impacting yields,\u2019 noted Lenaerts. \u2018The panels also provide the crops with shade and protection from adverse weather conditions, both of which can also contribute to increased yields.\u2019<\/p>\n

With the solar panels in place, farmers can produce the energy needed to power much of their farm\u2019s operations (e.g. lights, heating and cooling). This in turn reduces costs \u2013 and carbon emissions. HyPErFarm is also exploring ways of using this solar energy to produce clean hydrogen, which could then be used to power farm machinery and equipment.<\/p>\n

\u2018Agrivoltaic systems open the door to the complete electrification of farms,\u2019 added Lenaerts. \u2018Not only will this benefit farmers in terms of yield size and costs, it also ensures that agriculture does its part in helping Europe meet its climate goals.\u2019<\/p>\n

Let the sun shine in<\/strong><\/p>\n

While solar panels are great when used in the open fields, they\u2019re of limited use for greenhouses. \u2018Because solar panels are meant to absorb sunlight, they are usually opaque, even black,\u2019 said Dr Nick Kanopoulos, CEO of Brite Solar. \u2018However, because greenhouses need to maximise the amount of sun that shines in, solar panels are rather impractical.\u2019<\/p>\n

That\u2019s unfortunate as greenhouse-based farming produces 10 times the amount of food grown in the open field. \u2018The problem is that producing this amount of food requires 10 times more energy than what an outdoor field needs,\u2019 he added.<\/p>\n

The Brite Solar CEO believes the key to decreasing a greenhouse\u2019s energy use is to increase its use of solar power. And to do that, his company, with the support of the\u00a0PanePowerSW<\/a>\u00a0project, has invented what it calls solar glass: a transparent panel for greenhouses that looks like a normal window and can simultaneously let sunshine in and produce solar power.<\/p>\n

The secret to the solar glass\u2019 dual function is an innovative nanostructured coating. \u2018The nano coating only absorbs the UV light, which is useless to the plants and the solar cells,\u2019 Kanopoulos explained. \u2018The coating then transforms this UV light into what is called the red spectrum of light, which plants use to grow, and solar cells use to produce energy.\u2019<\/p>\n

To demonstrate just how big of a gamechanger this application is, Brite Solar built a 1,000 square metre greenhouse for a vineyard in Greece. Completely covered with nanostructure-coated solar cells, the greenhouse can produce 50\u00a0kW of power \u2013 enough to meet nearly all the greenhouse\u2019s energy needs. \u2018For the first time in agricultural history, we reported a negative carbon dioxide footprint per kilogram of crops produced,\u2019 he said.<\/p>\n

But the demo greenhouse is about more than just producing power. It\u2019s also about increasing yields. In fact, it\u2019s aim was to double the vineyard\u2019s yield over what can be achieved by a comparably sized outdoor vineyard.<\/p>\n

Here, greenhouses have a particular advantage over farm fields: they can produce crops year-round. For instance, the greenhouse vineyard in Greece is producing two harvests, one in the autumn and a second during the winter. This is an excellent, and relatively easy, way of increasing yields without having to create more crop land, which could ultimately mean less deforestation.<\/p>\n

\u2018All of this has profound environmental implications and points to a new way of farming \u2013 one that is fully electric, runs on renewable resources, and capable of sustainably producing the food we need to feed the future,\u2019 concluded Kanopoulos.<\/p>\n

In doing so, projects like PanePowerSW and HyPErFarm support such important EU policies as the Farm2Fork initiative, accelerating Europe\u2019s transition towards a sustainable food system.<\/p>\n

The research in this article was funded by the EU. If you liked this article, please consider sharing it on social media.<\/p>\n","protected":false},"excerpt":{"rendered":"

Power above, crops below. What a bright idea! Researchers are testing the effectiveness of growing crops under solar panels. A mix of aromatic herbs and flowers is being grown at a photovoltaic park on mainland Greece. In Spain, artichoke and broccoli are sharing fields with solar panels. In Belgium, panels have been installed right on … Read more<\/a><\/p>\n","protected":false},"author":298,"featured_media":1950,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"generate_page_header":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-1949","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earth-energy-environment"],"yoast_head":"\nTo feed a growing population, farmers look to the Sun - Horizon Magazine Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/scienceblog.com\/horizon\/1949\/to-feed-a-growing-population-farmers-look-to-the-sun\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"To feed a growing population, farmers look to the Sun\" \/>\n<meta property=\"og:description\" content=\"Power above, crops below. 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