Go to Brilliant.org/SciShow to try their Statistics course. Sign up now and get 20% off an annual Premium subscription. Every spring, around 20% of the population enters the season of sniffles, and some years are worse than others. But lately, there just don’t seem to be any better years because the different effects of climate change seem to be working together to make allergy seasons extra awful. Hosted by: Michael Aranda SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Silas Emrys, Drew Hart, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Christopher R Boucher, Eric Jensen, Adam Brainard, Nazara, Growing Violet, Ash, Laura Sanborn, Sam Lutfi, Piya Shedden, Katie Marie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer, Alisa Sherbow ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: doi.org/10.1073/pnas.1618618114 doi.org/10.3389/fpls.2018.00874 doi.org/10.7554/eLife.05557 doi.org/10.1016/S2542-5196(19)30015-4 doi.org/10.1073/pnas.2013284118 pubmed.ncbi.nlm.nih.gov/10716723/ doi.org/10.1371/journal.pone.0212010 doi.org/10.1093/oxfordjournals.pcp.a029493 pubmed.ncbi.nlm.nih.gov/25372614/ pubmed.ncbi.nlm.nih.gov/25978036/ pubmed.ncbi.nlm.nih.gov/25646533/ doi.org/10.1159/000487997 pubmed.ncbi.nlm.nih.gov/32689165/ doi.org/10.1007/s10584-017-2065-2 doi.org/10.1007/s10021-014-9822-0 doi.org/10.3389/falgy.2021.627863 doi.org/10.1007/s00484-016-1139-6 www.aafa.org/media/1634/extreme-allergies-global-warming-report-2010.pdf www.tn.gov/content/dam/tn/twra/documents/swap/tn-climate-change-swap-update.pdf www.nature.com/scitable/knowledge/library/effects-of-rising-atmospheric-concentrations-of-carbon-13254108/ Images: www.istockphoto.com/photo/its-so-much-more-than-flu-these-days-gm1217583991-355466207 www.istockphoto.com/photo/pollen-like-snow-gm91821142-9307204 commons.wikimedia.org/wiki/File:Misc_pollen.jpg www.istockphoto.com/photo/woman-using-asthma-inhaler-outdoor-gm1164728843-320235246 www.istockphoto.com/photo/springtime-pollen-in-the-air-gm1198284529-342411853 www.istockphoto.com/photo/pollen-gm476632040-66141851 www.istockphoto.com/photo/field-with-dandelions-and-bright-sky-gm931079536-255221831 www.istockphoto.com/photo/ragweed-gm92286049-5187453 commons.wikimedia.org/wiki/File:Photosynthesis_en.svg www.istockphoto.com/photo/ambrosia-pollen-gm115927816-2671831 commons.wikimedia.org/wiki/File:Ambrosia_artemisiifolia_plant7_(11741895306).jpg www.istockphoto.com/photo/drought-makes-the-wetland-dry-and-become-cracked-land-gm596078096-102194899 commons.wikimedia.org/wiki/File:Pinus_elliottii(1).jpg svs.gsfc.nasa.gov/4571 www.istockphoto.com/photo/young-woman-got-nose-allergy-flu-sneezing-nose-gm859615534-240747808 www.istockphoto.com/photo/allergy-concept-young-asian-woman-sneezes-and-blowing-her-nose-with-a-handkerchief-gm1145673155-308446649 www.istockphoto.com/photo/dusty-particles-background-image-gm1204246901-346430412 www.istockphoto.com/photo/defocused-lights-abstract-background-gm1198797490-342739165