Since the earth seems to be cooling already, should we do all this stuff in an insane attempt to cool it another tenth of a degree?

Australian Socialists Propose Climate Action Plan : Climate and Capitalism

Bringing greenhouse gas emissions under control will require deep changes and immense effort at every level - international, national and local. It requires the equivalent of a wartime effort to transform the economy and industry.

1. Implement immediate emission reduction targets with the aim being to reduce net emissions to zero as soon as practicable, with a goal of achieving 95% of power from renewable sources by 2020, and 90% cut in overall emissions by2030. Introduce annual reduction targets. [NOTE: The Socialist Alliance is now considering whether these targets are adequate, based on the latest climate science, and will review its position in December.]
2. Initiate further international treaty negotiations aimed at getting all countries to agree to a global target of 90 % emissions reductions on 1990 levels by 2030.
3. Start the transition to a zero-waste economy. Engage workers in industry, with technical experts, to redesign their products and jobs sustainably.
4. Require the fitting of all feasible energy efficiency measures to existing houses and subsidise owner-occupiers for the costs.
5. Bring all power industries under public ownership and democratic control.Begin phasing out coal mining and power immediately. Provide guaranteed jobs and retraining on full pay for coalmining and power-station communities, with new sustainable industries being built in their areas and paid redundancies offered.
6. Bring the whole car industry under public control. Re-tool this industry to manufacture wind turbines, public transport vehicles, solar hot water, and solar photo-voltaic cells. Subsidise the conversion of private cars to electric power.
7. Accelerate the construction of wind farms in suitable areas. Boost research into all renewable energy sources. Build pilot solar-thermal and geothermal plants now. Create localised power grids.
8. End the logging old-growth forests. Begin an urgent program of re-forestation, and protection of biodiversity to provide increased carbon sinks.
9. End industrial farming based on fertilisers, pesticides and fuel sourced from petroleum. Restrict farming areas to ensure that riverine, forest and other indigenous ecosystems return to healthy states. Encourage new farming practices including organic and urban farming.
10. Make all urban and regional public transport free and upgrade services to enable all urban residents to use it for all their regular commuting. Nationalise and upgrade interstate train and ferry services, to provide real alternatives to air travel. Rail freight must be prioritised. Ensure transport services are integrated.