Greenhouse gas emissions are the main cause of human-induced global warming. They can be reduced through:
- addressing energy use,
- reducing the amount of energy used (though energy efficiency and/or simple living)
- using more renewable energy
- using fossil fuels, and practicing carbon sequestration (see carbon sequestrationW), i.e. putting the CO2 underground.
- using fossil fuels, and practicing carbon offset (see carbon offsetW).
- using nuclear energy - while there are enormous safety, security and environmental hazards from nuclear energy, it has been proposed by some as part of the solution to global warming.
- Addressing agriculture and any other source of greenhouse gases, especially methane. Methane is 23 times as much to the Greenhouse Effect as CO2, in spite of having the same amount of carbon per molecule, or per unit volume. For this reason, removing, preventing or capturing 1 ton of CH3, earns 23 CO2e-certificates under the UNFCCC Emission Trading System.