This Student Knows What She'll Be Wearing All Semester. Thanks, Twitter.

Be careful what you promise in exchange for some retweets.

University of Alabama student Kelsey Hall posted a photo of herself dressed as a Christmas tree.

Then the 20-year-old vowed to wear it for the rest of the semester in exchange for 1,000 retweets:

You know what happened next, but Hall didn’t seem quite ready for it just the same. As the numbers marched toward 1,000, she posted:

Hall, a chemistry major, told People the costume was a gift from her mother and she thought the pic would be funny... but she didn’t think she’d actually have to wear it for the rest of the semester.

I definitely did not think I would get 1,000 retweets, I thought it was a very unrealistic number,” she said. “The most retweets I have ever got before was, maybe, five.”

Hall has been as good as her word. She and her friends have been posting images of her on campus in full tree regalia.

It was so bad because it’s still really hot outside, so it was really warm, but also just soaked in water,” she told BuzzFeed.

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“I went through with it because I know everyone is going through a tough time with finals coming up,” she told People. “And hopefully, I could bring some Christmas cheer to my classmates.”

Still, she doesn’t seem thrilled about her new life as a tree.

Her current pinned tweet:

On the bright side, at least for Hall, the semester ends next week.

Also on HuffPost

If you choose an artificial tree, you need to use it for a very long time

An artificial tree needs to be reused for many years to make it more environmentally friendly than buying a fresh-cut tree annually. According to forester Bill Cook, a fake tree would have to be used for more than <a href="http://msue.anr.msu.edu/news/environmental_effects_of_christmas_trees" target="_blank">eight&nbsp;to nine&nbsp;years</a>. A 2009 study out of Montreal, however, concluded it would take <a href="http://www.nytimes.com/2010/12/18/business/energy-environment/18tree.html" target="_blank">more than 20 years</a> of use to make it a more eco-friendly choice. <br /><br />Artificial trees have &ldquo;three times more impact on climate change and resource depletion than natural trees,&rdquo; said the study, conducted by the consulting firm Ellipsos.

If you’re going to buy artificial, choose domestic

More than <a href="http://www.realchristmastrees.org/dnn/Education/Fake-Trees" target="_blank">85 percent</a>&nbsp;of artificial Christmas trees in the U.S. are imported from China, significantly enlarging their carbon footprint.<br /><br />If you're opting for a fake tree, aim to buy one with a "Made In USA" label.&nbsp;

Similarly, if you’re buying a real tree, go local

Minimize the number of miles driven to get your Christmas tree. Research shows that driving to get your tree often has <a href="http://msue.anr.msu.edu/news/environmental_effects_of_christmas_trees" target="_blank">more environmental impact</a>&nbsp;than the tree itself.&nbsp;<br /><br />&ldquo;If you pick up a real tree close to your home or pick it up on a trip you were going to make anyway, the impact of the real tree is almost nil,&rdquo; Bert Cregg,&nbsp;a horticulture expert at Michigan State University, told HuffPost.<br /><br />Buying local also means supporting&nbsp;your community's growers and businesses, as well as preserving local farmland.<br /><br />The&nbsp;<a href="http://www.christmas-tree.com/real/" target="_blank">Christmas Tree Farm Network</a> maintains a comprehensive list of&nbsp;farms in the U.S., organized&nbsp;by state.

Real Christmas trees are grown specifically for that purpose

&ldquo;You&rsquo;re not doing any harm by cutting down a Christmas tree,&rdquo; Clint Springer, a botanist and professor of biology at Philadelphia's Saint Joseph&rsquo;s University, <a href="http://www.nytimes.com/2010/12/18/business/energy-environment/18tree.html" target="_blank">told</a> The New York Times in an earlier interview. &ldquo;A lot of people think artificial is better because you&rsquo;re preserving the life of a tree. But in this case, you&rsquo;ve got a crop that&rsquo;s being raised for that purpose.&rdquo;

Christmas tree farms can serve as a habitat for local wildlife

About <a href="http://www.realchristmastrees.org/dnn/Education/Quick-Tree-Facts" target="_blank">350 million trees</a> grow on Christmas tree farms in the United States, according to the National Christmas Tree Association. About 30 million of these trees are harvested annually.<br /><br />These farms have environmental costs of their own,&nbsp;noted Thomas Harman, who sells artificial Christmas trees. &ldquo;If you use an artificial tree for 10 years, you need 10 trees, and that is 70 years&rsquo; worth of growing trees,&rdquo; he <a href="https://weather.com/science/news/real-vs-fake-christmas-trees-which-better-environment-20131206" target="_blank">told</a> Weather.com in 2013. "You have 70 years of water and pesticide consumption."<br /><br /> Researchers say, however, that pesticides aren't actually too much of an issue on Christmas tree farms. <br /><br />&ldquo;If you look at the continuum of chemical use in U.S. agriculture, Christmas trees production certainly ranks on the low end,&rdquo; Cregg <a href="http://www.motherjones.com/environment/2012/12/greenest-christmas-trees-real-fake" target="_blank">told</a> Mother Jones in an earlier interview.<br /><br /> Christmas tree farms can also serve as important habitats for&nbsp;local birds, insects and other wildlife.

Real trees can be composted or recycled

Don't just chuck your used Christmas tree in the trash after the holidays. Repurpose or <a href="http://www.realchristmastrees.org/dnn/All-About-Trees/How-to-Recycle" target="_blank">recycle it</a>!&nbsp; <br /><br /> Many towns and cities have curbside pick-up options for recycling Christmas trees, or recycling drop-off centers. Some also offer tree <a href="http://gizmodo.com/how-to-recycle-your-christmas-tree-1674169369" target="_blank">mulching and chipping</a> programs, allowing residents to recycle their trees and take home a free bag of mulch for their garden. <br /><br /> Feeling handy? You can also turn your tree into a DIY project. Create coasters and decorations with the branches and trunk of your tree. Or make some Christmas-scented <a href="http://www.telegraph.co.uk/gardening/problem-solving/what-to-do-with-your-christmas-tree-in-january/" target="_blank">potpourri</a>.

This article originally appeared on HuffPost.