New Low-Cost Battery-Like Device Captures CO2 Emissions While It Charges

New Low-Cost Battery-Like Device Captures CO2 Emissions While It Charges

New Low-Cost Battery-Like Device Captures CO2 Emissions While It Charges

Researchers have developed a low-cost device that can selectively capture carbon dioxide gas while it charges. Then, when it discharges, the CO2 can be released in a controlled way and collected to be reused or disposed of responsibly.

The supercapacitor device, which is similar to a rechargeable battery, is about the size of a quarter, and is made in part from sustainable materials including coconut shells and seawater.

Designed by scientists from the University of Cambridge, the supercapacitor could help power carbon capture and storage technologies at a much cheaper cost. Every year, around 35 billion tonnes of CO2 are released into the atmosphere, and solutions are urgently needed to eliminate these emissions and address the climate crisis. The most advanced current carbon capture technologies are quite expensive and require large amounts of energy.

The supercapacitor consists of two electrodes of positive and negative charge. In work led by Trevor Binford while completing his Master’s degree at Cambridge, the team tried alternating from a negative to a positive voltage to extend the charging time from previous experiments. This improved the supercapacitor’s ability to capture carbon.

Read more.

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Question: Wikipedia article on rectal breathing

Answer: Rectal breathing is a technique for controlling the volume of air inhaled into the lungs by increasing the amount of air held in the rectum, thereby reducing the amount of air in the lungs. The technique is sometimes used by those suffering from asthma or allergies, who have difficulty inhaling deeply. It can also be used to reduce hyperventilation, as in anxiety attacks.

Rectal breathing is an ancient technique. It was described by the ancient Greek physician Galen in the second century CE, who wrote: "It is the best thing for a person who is affected by an asthma attack to make a fist and put his hand over his mouth and nose and then breathe through his rectum."

Rectal breathing is also sometimes used by competitive breath-hold divers, who can hold their breath for over 12 minutes. In order to reduce the amount of air in the lungs, and thus reduce the work of breathing, they hold a large volume of air in their rectum.

From the HN comments on the new scientific AI from Facebook

3 years ago

You mean I will have to socialize for the best health of my garden? This is horrible!

Tips for wise gardening

My experience as a landscaper has mostly been in fixing or maintaining the bad ideas of other people. With that in mind, I’d like to share some advice on how to garden wisely.

Aggressive plants are high maintenance, avoid them. For many years the industry has touted aggressive plants as groundcovers because they’re very easy for them to mass-produce and they grow impressively for customers. However, aggressive plants ALWAYS breech containment. The effort of ripping out or just monthly hacking back aggressive vines which attack your house is much greater than the annoyance of having to wait for slower growers to establish.

Carefully research every plant you purchase. Research is treated like a chore in the plant community and many people celebrate their impulsiveness when it comes to purchasing plants. This is a mistake. The $2 plant you plop in the ground and forget about could eventually take over your yard. Knowing exactly what you’re buying, where it’s from and how it grows will help you know if it’s the right choice for you. Plus, getting to know a plant and learn what makes it interesting and beautiful will give you a better appreciation for it once the novelty wears off.

Only plan as much garden maintenance for yourself as you would like to do on the hottest day of the year. It’s inevitable that we pay more attention to our gardens when it’s a pleasant day outside but the weeds don’t mind the heat. By all means spend more time outside in the spring and fall, get big projects done but keep in mind that they must be maintained and that you will often not feel like spending your weekend toiling away at an overgrown bed in July. This one is tough because it takes a little experience to get a feeling for how much work you can get done in a day. I know for myself and my schedule, I will not weed my beds every week. I plant things that can hold their own against weeds without becoming weeds themselves. These are almost always native plants.

Shrubs and trees should be planted so that when they are fully grown they do not touch any part of your house. Branches rubbing against your house damage your siding, retain too much moisture, and make maintenance to your house difficult. Similarly, plants should never overhang pathways in a way that would interfere with their use. Always leave ample headroom and plenty of clearance on either side of paths, keeping in mind that branches will bend and droop with rain or snow.

Take the time to study your landscape as it exists now before changing it. Learn the names of the plants which are already planted, try to figure out why they were planted there and if it’s a good place for them. Learn where the sun strikes your yard at different times of the day, a patch that looks like full sun at noon may be in deep shade for the morning and afternoon. Which way do the prevailing winds blow in the different seasons? Some plants which bloom in the very early spring will be better suited to a location where they’re kept out of the winter wind but have good ventilation in summer. Is the soil clay, sandy, loamy, silty, or rocky? Are there low areas where water pools after a rain or dry areas where the turf always goes brown in summer. Find the most comfortable and frequently-used areas of your house and yard, what can you see in the garden from them and what would you like to see?

Make plans, budgets, sketches, and notes about what you do in the garden. Find a system of documentation that works for you, whether it’s as simple as saving plant tags or as complicated as drawing up designs, you should know what plants you have where and why. Ideally your system should have the common name, scientific name, a brief description, the reasoning behind its location, and when it was planted. For example: “Rosemallow, Hibiscus moscheutos; trident-shaped leaves with undertones that match the color of the blossom, large, blousy, open flowers in white-red range with a dark iridescent eye, shoots don’t emerge until June, flowers appear in mid-July and continue til frost; planted in 2015 at the bottom of the hill where the water pools on the southeast corner of the house near the back door because they like wet feet and the bare canes are hidden by clematis and agastache early in the season before foliage emerges.”

The cheapest way to buy plants is to buy seed, the cheapest way to get plants is by making friends. There are some beloved garden plants which are very difficult to grow from seed but many are not. Know the difference between them. Growing from seed is not always slower and frequently results in healthier growth long-term. Even better than buying seed is to get free plants from or swap plants with a friend. There are tons of plants which thrive through division, many plants make viable seed which can be shared, tubers and cuttings are simple to take and easy to transport. Get to know your neighbors who garden, offer them something from your yard or propose a swap. Many people are happy to share or trade plants. Be sure to ask them as much as you can about the plants they give and their care. The advice you get may be more valuable than any of the plants you get. Speaking of which…

Listen to experienced gardeners. Find the people who have been doing this for years, they might not look old but may have a lot of knowledge. Find people who have similar conditions to yours and who garden in your same area. So much of horticulture boils down to local conditions. If there’s a plant you’ve tried and failed with, find someone who is growing it well and ask them everything about their yard and how they care for it. “Your hydrangeas are just gorgeous! May I ask how you get them to grow so well? I have so much trouble with them in my yard.” Ask about their soil texture and color, what products they use, what they do in the winter, if they irrigate, and anything else you can think of. Many gardeners will happily talk your ear off about their gardens if you give them the chance.

2 years ago

woulge you grill her a cheese

2 years ago
a digital fullbody drawing of swordsmachine from ultrakill. it is facing right, holding it's sword with one hand, while its other arm rests on top of it. it has one leg slightly raised over the other as it sits. theres a red rim light shining on it from the right. a bright, yellow trail is coming off the sword, which circles the entire piece. the background is a red and black gradient.
the same drawing as before, but with a pure black background.
the same drawing as before, but with both a pure black background and without the sword's yellow trail.

i love you swordsmachine

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