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The cryptocurrency industry, including Bitcoin, is energy intensive, requiring huge amounts of electricity to run numerous arrays of computers in which so-called crypto-miners verify transactions. Where that power comes from is creating a power struggle in at least one local community.
Sea cucumbers are not vegetables. They’re invertebrates that look like big lumpy worms and are related to starfish and urchins. They perform an important role in marine environments, using their feet—which look like tentacles around their mouths—to break down tiny particles of algae and recycle nutrients.
Credit: Bernard Dupont/Creative Commons
Europe depends on Russia for much of its oil and gas supplies. Eurostat figures for 2020 found that the EU relies on Russia for 43.6 percent of its gas and 48.4 percent of its oil supply. Last week, several European countries asked residents to consume less energy amid growing concerns Moscow could turn off the tap. According to Reuters, the International Energy Agency (IEA) in Paris notes that, when done on a large scale, small behavioral changes can significantly reduce demand. It estimates that turning down thermostats in buildings across the European Union by 2 degrees Celsius would save 20 billion cubic meters of gas, worth about $28 billion at current prices.
Anaerobic Digestion Biogas Plant with Composting for energetic and material recycling of Municipal Biowaste in Sundern, Germany | Credit: Thzorro77/Creative Commons
The food we eat has a water footprint, not only from growing crops and feeding livestock but also from producing and manufacturing the end product we find on our grocery shelves—a process that can create a lot of wastewater. But according to researchers at University of Gothenburg and Chalmers University of Technology, wastewater can be used as fertilizer for growing seaweed to help feed a rising global population. It’s estimated that by 2050, ten billion people will live on Earth, creating a need for sustainably produced protein.
A certain amount of process water with a controlled content of nitrogen was added to the seaweed cultivation. The result showed that the seaweed grew more up to 60 percent faster, and the protein content quadrupled with the addition of process water. | Credit: Kristoffer Stedt