Chemtrails are no longer conspiracy theories - here are some official documents

Official documents:

1- NOAA Chemical Sciences Laboratory (CSL) - "For Stratospheric Aerosol Injection, All Strategies are Not Created Equal" (2023)

    Link: https://csl.noaa.gov/news/2023/390_1107.html
    Details: This news article summarizes a study published in Atmospheric Chemistry and Physics (Bednarz et al., 2023) on SAI strategies, including injecting sulfur dioxide (SO2) into the stratosphere. The full paper is linked within the article.
    Access to Full Paper: https://doi.org/10.5194/acp-23-13665-2023 (open access).

2 - U.S. Government Accountability Office (GAO) - "Climate Change: A Coordinated Strategy Could Focus Federal Geoengineering Research and Inform Governance Efforts" (GAO-10-903, 2010)

    Link: https://www.gao.gov/assets/gao-10-903.pdf
    Details: This report discusses SAI as a geoengineering method, including aerosol injection to reflect sunlight. It’s a direct PDF from the GAO website.

3 - Intergovernmental Panel on Climate Change (IPCC) - Sixth Assessment Report (AR6), Working Group I

    Link: https://www.ipcc.ch/report/ar6/wg1/
    Details: Chapter 4 (Section 4.6.3.3) covers solar radiation modification, including SAI. The full report is available as a PDF download from the site (see "Full Report" link). Search for "stratospheric aerosol injection" within the document for specifics.
    Direct PDF: https://www.ipcc.ch/report/ar6/wg1/downloads/report/IPCC_AR6_WGI_Full_Report.pdf.

4 - National Academy of Sciences (NAS) - "Climate Intervention: Reflecting Sunlight to Cool Earth" (2015)

    Link: https://nap.nationalacademies.org/catalog/18988/climate-intervention-reflecting-sunlight-to-cool-earth
    Details: This book-length report details SAI, including methods like sulfate aerosol injection. The full text is available for free download as a PDF after registering on the site (click "Download Free PDF").
    Direct Access: Requires sign-up, but no cost.

5 - U.S. Congressional Research Service (CRS) - "Geoengineering: Governance and Technology Policy" (2013)

    Link: https://crsreports.congress.gov/product/pdf/R/R41371
    Details: This report outlines SAI and its governance challenges, including aerosol spraying specifics. It’s a direct PDF from the CRS website.

6 - Geoengineering Monitor - "Stratospheric Aerosol Injection (Technology Briefing)" (2021)

    Link: https://www.geoengineeringmonitor.org/wp-content/uploads/2021/04/stratospheric-aerosol-injection.pdf
    Details: This briefing provides a technical overview of SAI, including proposed methods like sulfur dioxide injection. It’s a direct PDF download from a non-governmental research site, summarizing scientific literature.