NASA. 2025. Methane. https://climate.nasa.gov/vital-signs/methane/?intent=121

Papies, E. K., Nielsen, K. S., & Soares, V. A. (2025). Health psychology and climate change: time to address humanity’s most existential crisis. Health Psychology Review, 19(3), 463–493. https://doi.org/10.1080/17437199.2024.2309242

Popovski, V. (2024). Climate Change as an Existential Threat: Translating Global Goals into Action. Environmental Policy and Law, 54(2–3), 127–139. https://doi.org/10.3233/EPL-239025

Message on the House Of Commons website 2025-09-09: “Between 8:00 a.m. EDT on September 2 and 12:00 p.m. EDT on September 3, 2025, the E-petitions system experienced technical issues that may have prevented some signatures from being recorded. If you signed a petition during this time and if you have not received a confirmation request email, please re-attempt to sign the petition. The system will notify you if you’ve already signed, so duplicate signatures are not possible. We appreciate your understanding in this situation.”

Hi Lamda,

Thank you for your interest. Not sure, but access to this petition may be georestricted to Canada. Meaning if you are using a proxy, VPN, or are outside of the country you may lack access.

If you are in Canada, then it might be an error with the link/site. You can try navigating to https://www.ourcommons.ca/en (link to House of Commons of Canada website) -> Petitions -> Search -> Petitions open for signature and search “e-6728”. To sign the petition tap/left-click “e-6728”-> tap/click “Sign the petition” -> Enter details -> tap/click “SIGN” -> view email for confirmation link -> navigate to the confirmation page.

Another thing that may help is signing the petition in incognito mode in case of caching issues.

Note the House of Commons is a government site and petitions there are free to sign.