Solar energy is the future and it keeps getting better. Not only are renewables cheaper than destructive gas and coal energy they also have other positive effects. Recently it’s been discovered that solar fields can be used as a really good place to grow crops. This is counterintuitive as the solar panels block the sun which plants typically love and to service the panels there needs to be a pathway where crops would thrive.
However, by planting shade-tolerant plants beneath the panels it means workers can still do their job and the plants can do theirs. The plants do well in the shade thanks to the ambient light and the increased humidity from the panels themselves. Neat!
The researchers see potential here (and in similar “agrivoltaics” experiments elsewhere) that is worth investigating and optimizing. Solar panel installations may not be compatible with the machinery used to harvest many crops, and boosting the panels higher off the ground costs extra. But there are configurations for certain crops in certain areas that can make a lot of sense. Farmers could save water, make money from a solar lease, and might even find that workers are much more comfortable and safe working under some shade—all while allowing solar arrays to expand in those areas without competing for land with agriculture.
Renewable energy just kept getting cheaper and cheaper despite ongoing subsides for the oil and gas industries. This is really good to see as people who only care about short term economic energy decisions will have to start to advocate for renewable energy. The decrease in cost for renewable wind power can be attributed to bigger blades and better energy grid management. This means that not only is wind power cheaper, the better grid management can lead to other renewable sources getting cheaper too.
In the US, the prices for wind power had risen up until 2009, when power purchase agreements for wind-generated electricity peaked at about $70 per MegaWatt-hour. Since then, there’s been a very steady decline, and 2018 saw the national average fall below $20/MW-hr for the first time. Again, there’s regional variation with the Great Plains seeing the lowest prices, in some cases reaching the mid-teens.
That puts wind in an incredibly competitive position. The report uses an estimate of future natural gas prices that show an extremely gradual rise of about $10/MW-hr out to 2050. But natural gas—on its own, without considering the cost of a plant to burn it for electricity—is already over $20/MW-hr. That means wind sited in the center of the US is already cheaper than fueling a natural gas plant, and wind sited elsewhere is roughly equal.
Want to save the planet? Reduce how often you wash your clothes, you don’t need to wash your shirt that you wore for only one day. This is something you can start doing today to help make a better tomorrow.
When it comes to your wardrobe overall you can alter what clothes you buy to ensure that you barely need to do laundry at all. There are new companies and clothing lines that focus on making clothes which are designed to survive multiple wears without getting dirty. I think it would be great to never have to launder anything again!
Decades of marketing from the cleaning industry has conditioned many people to throw their clothes in the laundry after one day’s wear, even though this is rarely necessary. So one of the biggest challenges for brands pitching clothes that don’t need to be washed frequently is to convince people that they will not be gross, smelly, or dirty if they aren’t constantly doing loads of laundry.
Bishop, for his part, decided to create wool blends with other materials, including nylon and linen to achieve different effects. Synthetic fibers, for instance, are able to make clothes more durable because they are hardier. This was a difficult decision, because while wool and other natural fibers are biodegradable, nylon, polyester, and other synthetics are plastic-based so they will not decompose, but sit in landfills forever. “We had some difficult decisions to make when it came to sustainability,” Bishop says. “But we decided that our goal as a brand was to make it easier for people to own fewer clothes, and keep them for longer. So we decided to incorporate synthetics.”
An often overlooked aspect of sustainable energy is the seemingly simple switching of electricity. Physical switches slow down the ability of repairs on power systems and can even hinder the installation of renewable energy sources. A lot of renewable energy systems (solar, wind, tidal, etc.) fluctuate greatly in the power output which strains switches; this is where digital circuits thrive. With digital switching it is easier to dynamically change power sources and remotely monitor them.
“Instead of using mechanics to switch the power, we apply digital inputs,” Kennedy told Popular Mechanics. “Now I have no moving parts. Now I have the ability to connect things like iPhones and iPads for remote power management, which increases safety and improves efficiency. I can set the distribution panel to a schedule so the flow of power is seamless, unlimited, and shifts between sources automatically. You literally wouldn’t notice. The lights wouldn’t even flicker.”
For a grid-connected solar home, for example, residents sometimes have to disconnect their solar input because traditional power systems (including the circuit breakers) aren’t advanced enough to properly manage multiple power sources that change.
A panel at Collision Conference today looked at the state of the energy grid in Africa. The panellists are involved in bringing sustainable energy solutions to the continent in various ways.
The artist Akon has founded Akoin to help people better deal with currency complications throughout the continent. The profits from the company are then used to fund solar installations so the coin and the continent can run sustainably.
The AKoin Ecosystem unlocks the potential of the world’s largest emerging economy through the creation of a stable currency and innovative, revenue-generating opportunities that stimulate and support youth entrepreneurship, economic stability, and growth across Africa and the world.
Jesse Moore from M-Kopa has built a solar panel company that sells solar energy directly to consumers. They’ve brought electricity to over 750,000 houses and are open to skipping the electricity grid entirely. Customers can’t afford the full installation but they they can afford to pay for electricity as it’s needed without having to connect to a larger system.
The future of sustainable energy in Africa is looking bright!