how the temperature increase could be avoided using realistic, scientifically relevant, achievable strategies.

Whilst I agree with Virtualguy's first two paragraphs, ( they wont stop the non-existent warming) but they are sane sensible proposals.

The only realistic proposal is more nuclear generation, solar and wind wont work because of EROEI (energy returned on energy invested) even if we could come up with electricity storage systems, they would be no good because of the extra energy invested in storage would nullify their effectiveness, hydro is great but because geographical areas restricted an increase in hydro is unlikely, geothermal for the same reason.

That leaves nuclear fission or possible future fusion.

Restore oceanic biomass, primarily through known better fisheries management. The standing crop of the ocean has declined drastically in the last century. Restoring the biomass increases the stored carbon and the biological capability for sequestering carbon while bolstering the economic potential of fisheries.

Improved soil conservation practices. As Freeman Dyson pointed out, there's a lot of potential for better storage of carbon in agricultural soils, which also improves yields, a major consideration in an increasingly crowded world. Putting the non-food carbon back in the soil makes a lot more sense than burning it as biofuel. Leave biofuels to the aquaculture crowd if they ever come up with profitable techniques.

Improved energy efficiency. The share of electricity used for lighting, for example, has plummeted in recent years due to CFL and is dropping further with LED lamps. There's a lot of money to be saved from better home insulation, improved manufacturing efficiency and improved commercial building energy management.

Energy from renewable resources. For countries without an existing electrical grid, emphasis on building distributed resources - enough power from solar NOW to keep the water tank filled and the phone and reading lights charged yields a lot more benefits than industrial-scale power from the grid in a decade or so. Countries with existing grids need to make them smarter, for better handling of distributed power.

Governments could speed up the elimination of excess CO2 output by eliminating fuel subsidies, backing loans for improved energy efficiency investments such as home insulation, and encouranging better agricultural soil preservation.

Finally, governments could speed up the conversion by applying economic disincentives to fossil fuel use such as actually enforcing existing safety and pollution standards on extractive industries and power plants, carbon cap and trade or various forms of carbon tax. According to the track record, this doesn't amount to a realistic strategy.

Planting trees, population control and using food for fuel won't work. Nor will stopping Keystone XL. The only way to stop global warming is to use zero emission energy sources, such as solar, hydro and nuclear power.

I'll assume you are asking about green house warming: Carbon dioxide leaks from the ground in a million locations, Most of which could be collected and sequestered at less cost than collecting the carbon dioxide from dirty coal fired electric power plants.

the amount of energy the earth receives from the sun in one day is equal to what we use in a year.

the fossil fuel industry doesn't want anyone to know that