www.ucs.org

• charset: utf-8
• name: description content: The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems. Joining with people across the country, we combine technical analysis and effective advocacy to create innovative, practical solutions for a healthy, safe, and sustainable future.
• property: og:site_name content: The Union of Concerned Scientists
• property: og:type content: website
• property: og:url content: https://www.ucs.org/node/1
• property: og:title content: Union of Concerned Scientists
• property: og:description content: The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems. Joining with people across the country, we combine technical analysis and effective advocacy to create innovative, practical solut
• property: og:image content: https://www.ucs.org/themes/custom/ucstheme/assets/social-logo.png
• property: og:image:alt content: The Union of Concerned Scientists
• property: fb:app_id content: 132077610903962
• name: twitter:card content: summary_large_image
• name: twitter:description content: The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems. Joining with people across the country, we combine technical analysis and effective advocacy to create innovative, practical solut
• name: twitter:site content: @UCSUSA
• name: twitter:title content: Union of Concerned Scientists
• name: twitter:creator content: @UCSUSA
• name: twitter:image content: https://www.ucs.org/themes/custom/ucstheme/assets/social-logo.png
• name: twitter:image:alt content: The Union of Concerned Scientists
• name: Generator content: Drupal 11 (https://www.drupal.org)
• name: MobileOptimized content: width
• name: HandheldFriendly content: true
• name: viewport content: width=device-width, initial-scale=1.0

• Skip to main content
• Learn more
• See all
• Funding & Financials
• Mission & Values
• More ways to give
• History
• Regional Work
• Programs
• People
• Racial Equity
• Jobs
• Media Center
• Take Action
• Science Rising
• Climate Accountability
• Climate Campaign for the Future
• Power Ahead
• Transforming Transportation
• Preventing Nuclear War
• Healthy Food and Farms
• A Healthier Democracy
• Science Network
• See all reports & multimedia
• http://www.ucs.org/search
• http://www.ucs.org/
• Climate
• Climate Science in Legal Contexts
• Impacts
• Science
• Accountability
• Solutions
• Energy
• New England’s Offshore Wind Solution
• Renewable Energy
• Nuclear Power
• Fossil Fuels
• Solutions
• Transportation
• http://www.ucs.org/node/16093
• Access
• Technologies
• Oil
• Solutions
• Food
• Less Fertilizer, Better Outcomes
• Sustainable Agriculture
• Healthy Food
• Food Justice
• Solutions
• Nuclear Weapons
• Plutonium Pit Production
• Justice
• Worldwide
• Missile Defense
• Solutions
• Science & Democracy
• Access Denied
• Independent Science
• Evidence-Based Decisions
• A Healthier Democracy
• More ways to give
• Menu
• http://www.ucs.org/#
• The Case Against ExxonMobil, Chevron, and other Fossil Fuel Companies
• http://www.ucs.org/node/16219
• UCS vs Anti-Science Actions
• UCS: What We Do
• Read the press release
• text "SCIENCE" to 67369
• Terms, Conditions, and Privacy Policy
• Privacy Policy
• State Disclosures
• FAQ
• Contact
• Learn more

• en español
• Donate now
• Renew
• Become a member
• Give monthly
• Gift memberships
• Gifts in honor & memory
• Send Letter
• Act Now
• Send Letter
• Take Action
• Take Action
• Send Letter
• Give monthly
• Donate
• Take Action
• UCS
• Sign up
• UCS
• Donate
• Visit the store
• View the blog
• sign up online
• https://www.facebook.com/unionofconcernedscientists
• https://bsky.app/profile/ucs.org
• https://www.youtube.com/user/ConcernedScientists
• https://www.instagram.com/unionofconcernedscientists
• UCS
• I'm ready to give
• Learn More
• I'm ready to make a gift
• Tell me more
• Donate
• Renew
• Honor & memory
• Become a member
• Give monthly
• Make a planned gift
• Gift memberships

            Domain Name: UCS.ORG
Registrar: Network Solutions, LLC
Domain Status: client transfer prohibited
Registry Expiry Date: 2026-11-01T05:00:00Z
Creation Date: 1992-11-02T05:00:00Z
Updated Date: 2025-09-07T06:25:03.143Z
Name Server: ALI.NS.CLOUDFLARE.COM
Name Server: MAX.NS.CLOUDFLARE.COM
REGISTRAR Contact: Network Solutions, LLC
>>> Last update of RDAP database: 2026-06-08T21:06:53Z         

			#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed

#
# Client Custom Append Section
# To modify this config section, edit /custom-scaffold-assets/robots.txt.append, then run composer install
#

#
# End Client Custom Append Section
#
        

SEO técnico

SEO en la página

Contenido y UX