If you wanted to fly around the world, how much fuel would you need? The answer: zero.

Heavier-than-air flight is mind-boggling when you think about it. I mean, a 737 can weigh over 75 tons.

Just going to ignore the fact that 12 elephants' worth of weight is probably directly over my head right now... Image from Philippe Huguen/AFP/Getty Images.


It takes a lot of fuel to keep them up in the sky, too. A 737 burns through one gallon of jet fuel roughly every five seconds.

Planes are thirsty, thirsty things. Image from Outanxio/Wikimedia Commons.

That's about 750 gallons per hour!

So if you wanted to fly around the world, how much fuel would you need? As of this year, the answer is ... zero.

Image from Jean Revillard via Getty Images.

Yup, zero. As in nada. Zilch. One less than one. The big nothing. Zero.

This is the Solar Impluse 2. It's a plane powered completely by solar energy.

Image from Jean Revillard via Getty Images.

The plane is the child of the Solar Impulse project.

It doesn't use a drop of jet fuel. Instead, it generates electricity from solar panels on its 236-foot wings.

Image from Jean Revillard/AFP/Getty Images.

And if you're worried about it dropping out of the sky at night, don't. Batteries behind the pilot's cabin store plenty of power.

It doesn't go very fast — only about 30-40 mph.

Image from Jean Revillard/AFP/Getty Images.

That's pretty slow compared to a 737's 600 mph, but since the sun isn't going to do anything weird anytime soon* the plane can effectively fly forever, stopping only for repairs and to let the pilots out.

*At least not for, like, 5 billion years, anyway.

The Solar Impulse 2 is just big enough for its two pilots: Bertrand Piccard and André Borschberg.

Images via Jean Revillard via Getty Images.

Piccard is a psychiatrist and explorer, and Borschberg is an engineer and entrepreneur.

Since Solar Impulse 2's departure from Abu Dhabi in 2015, the plane has already traveled 12,400 miles around the world.

Image from Josh Edelson/AFP/Getty Images.

Starting in the United Arab Emirates, the plane has visited Oman, India, Myanmar, China, Japan, and, most recently, the United States.

Along the way, it's set new world records, including longest distance travelled by a solar plane and longest solo flight time of any aircraft.

The latest leg of its trip was a 62-hour journey from Kalaeloa airport in Hawaii to Moffett airfield in Mountain View, California.

Solar Impuse 2 landing in Mountain View. Image from Josh Edelson/AFP/Getty Images.

Next, the plane will travel over the U.S., then onward across the Atlantic Ocean to either North Africa or Southern Europe before continuing back toward its starting point in Abu Dhabi.

While the Solar Impulse 2 isn't going to put Boeing out of business anytime soon, that's not the point. The point is to show that clean energy is not only possible, but already here.

Image from Jean Revillard/AFP/Getty Images.

There's no secret magic technology making Solar Impulse 2's flight possible. All of this technology, like solar cells and efficient, energy-dense batteries, is readily available.

In fact, #FutureIsClean, an initiative started by Solar Impulse, claims that these same technologies could be used right now to reduce our energy consumption by 50% if we only had the spirit and will to implement them.

Humans have everything we need to convert to clean energy. We just need leaders and explorers to make it happen.

Watch Solar Impulse 2 fly over the Golden Gate Bridge below:

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Amazon

Shopping sustainably is increasingly important given the severity of the climate crisis, but sometimes it's hard to know where to turn. Thankfully, Amazon is making it a little easier to browse thousands of products that have one or more of 19 sustainability certifications that help preserve the natural world.

The online retailer recently announced Climate Pledge Friendly, a program to make it easier for customers to discover and shop for more sustainable products. To determine the sustainability of a product, the program partnered with third-party certifications, including governmental agencies, nonprofits, and independent labs.

With a selection of items spanning grocery, household, fashion, beauty, and personal electronics, you'll be able to shop more sustainably not just for the holiday season, but throughout the year for your essentials, as well.

You can browse all of the Climate Pledge Friendly products here, labeled with an icon and which certification(s) they meet. To get you on your way to shopping more sustainably, we've rounded up eight of our favorite Climate Pledge Friendly-products that will make great gifts all year long.

Amazon

Jack Wolfskin Women's North York Coat

Give the gift of warmth and style with this coat, available in a variety of colors. Sustainability is built into all Jack Wolfskin products and each item comes with a code that lets you trace back to its origins and understand how it was made.

Bluesign: Bluesign products are responsibly manufactured by using safer chemicals and fewer resources, including less energy, in production.


Amazon

Amazon All-new Echo Dot (4th Gen)

For the tech-obsessed. This Alexa smart speaker, which comes in a sleek, compact design, lets you voice control your entertainment and your smart home as well as connect with others.

Reducing CO2: Products with this certification reduce their carbon footprint year after year. Certified by the Carbon Trust.


Amazon

Burt's Bees Family Jammies Matching Holiday Organic Cotton Pajamas

Get into the holiday spirit with these fun matching PJs for the whole family. Perfect for pictures that even Fido can get in on.

Global Organic Textile Standard: This certifies each step of the organic textile supply chain against strict ecological and social standards. Each product with this certification contains 95%-100% organic content.

Amazon

Naturistick 5-Pack Lip Balm Gift Set

With 100% natural ingredients that are gentle on ultra-sensitive lips, this gift is a great gift for the whole family.

Compact by Design (Certified by Amazon): Products with this certification are packaged without excess air and water, which reduces the carbon footprint of shipping and packaging.


Amazon

Arus Women's GOTS Certified Organic Cotton Hooded Full Length Turkish Bathrobe

For those who love to lounge around, this full-length organic cotton bathrobe is the way to go. Available in five different colors, it has comfortable cuffed sleeves, a hood, pockets, and adjustable belt.

Global Organic Textile Standard: This certifies each step of the organic textile supply chain against strict ecological and social standards. Each product with this certification contains 95%-100% organic content.

Amazon

L'Occitane Extra-Gentle Vegetable Based Soap

This luxe soap, made with moisturizing shea butter and scented with verbena, is perfect for the self-care obsessed.

Compact by Design (Certified by Amazon): Products with this certification are packaged without excess air and water, which reduces the carbon footprint of shipping and packaging.

Amazon

Goodthreads Men's Sweater-Knit Fleece Long-Sleeve Bomber

For the fashionable men in your life, this fashion-forward knit bomber is an excellent choice. The sweater material keeps it cozy and warm, while the bomber jacket-cut, zip front, and rib-trim neck make it look elevated.

Recycled Claim Standard 100: Products with this certification use materials made from at least 95% recycled content.

Amazon

All-new Fire TV Stick with Alexa Voice Remote

Make it even easier to access your favorite movies and shows this holiday season. The new Fire TV Stick lets you use your voice to search across apps. Plus it controls the power and volume on your TV, so you'll never need to leave the couch! Except for snacks.

Reducing CO2: Products with this certification reduce their carbon footprint year after year. Certified by the Carbon Trust.

In the hours before he was sworn in as the 46th president of the United States, then-President-elect Biden was sent a letter signed by 17 freshmen GOP members of the House of Representatives.

In sharp contrast to the 121 Republican House members who voted against the certification of Biden's electoral votes—a constitutional procedure merely check-marking the state certifications that had already taken place—this letter expresses a desire to "rise above the partisan fray" and work together with Biden as he takes over the presidency.

The letter reads:

Dear President-elect Biden,

Congratulations on the beginning of your administration and presidency. As members of this freshman class, we trust that the next four years will present your administration and the 117thCongress with numerous challenges and successes, and we are hopeful that – despite our ideological differences – we may work together on behalf of the American people we are each so fortunate to serve.

After two impeachments, lengthy inter-branch investigations, and, most recently, the horrific attack on our nation's capital, it is clear that the partisan divide between Democrats and Republicans does not serve a single American.

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If the past year has taught us nothing else, it's that sending love out into the world through selfless acts of kindness can have a positive ripple effect on people and communities. People all over the United States seemed to have gotten the message — 71% of those surveyed by the World Giving Index helped a stranger in need in 2020. A nonprofit survey found 90% helped others by running errands, calling, texting and sending care packages. Many people needed a boost last year in one way or another and obliging good neighbors heeded the call over and over again — and continue to make a positive impact through their actions in this new year.

Upworthy and P&G Good Everyday wanted to help keep kindness going strong, so they partnered up to create the Lead with Love Fund. The fund awards do-gooders in communities around the country with grants to help them continue on with their unique missions. Hundreds of nominations came pouring in and five winners were selected based on three criteria: the impact of action, uniqueness, and "Upworthy-ness" of their story.

Here's a look at the five winners:

Edith Ornelas, co-creator of Mariposas Collective in Memphis, Tenn.

Edith Ornelas has a deep-rooted connection to the asylum-seeking immigrant families she brings food and supplies to families in Memphis, Tenn. She was born in Jalisco, Mexico, and immigrated to the United States when she was 7 years old with her parents and sister. Edith grew up in Chicago, then moved to Memphis in 2016, where she quickly realized how few community programs existed for immigrants. Two years later, she helped create Mariposas Collective, which initially aimed to help families who had just been released from detention centers and were seeking asylum. The collective started out small but has since grown to approximately 400 volunteers.