The initiative "Scientists Warning" has published an article ahead of COP26 on the urgent need for climate action at all levels, which you can read and sign here:
https://www.scientistswarningeurope.org.uk/signature
Summary extract:
The time for empty commitments for the distant future of 2050 is over. Large-scale, rapid, transformative changes in our economies, societies, cultures and politics are necessary on a timescale of superhuman speed.
• Inertia must be overcome to ensure that essential and massive action is well underway in the five-year period 2022-2026. Unprecedented global collaboration is needed now. Our short-term action or inaction will determine our common future. The science is clear and irrefutable; humanity is already in advanced ecological overshoot.
• Many climate scientists fear that the 1.5 or 2.0 C degree Paris targets are insufficient and will push us irreversibly onto a Hothouse Earth pathway. The carbon and heat already trapped in our oceans and atmosphere guarantee that we will exceed 1.5C. Too many leaders are willing to risk catastrophe when it will be another's problem.
• Protest and other bottom-up demands for change will help break through barriers and instil urgent action.