The main input of energy to the Earth's climate and the primary source of energy for our planet is solar radiation from the Sun. This energy is crucial for maintaining Earth's climate and supporting life as we know it.

Here's how it affects the climate of the Earth:

In summary, solar radiation from the Sun is the primary source of energy for the Earth's climate system. It drives weather patterns, ocean currents, and climate zones, and it is a fundamental factor in maintaining the Earth's temperature within a range conducive to life. Changes in the amount or distribution of solar radiation can have significant impacts on Earth's climate and can lead to variations in temperature and climate conditions over time.

Dr Gaurav H Tandon thank you for your contribution to the discussion

The Sun warms the planet, drives the hydrologic cycle, and makes life on Earth possible. Solar radiation is the fundamental energy driving our climate system, and nearly all climatic and biologic processes on Earth are dependent on solar input. Energy from the sun is essential for many processes on Earth including warming of the surface, evaporation, photosynthesis and atmospheric circulation.Solar, wind, hydroelectric, biomass, and geothermal power can provide energy without the planet-warming effects of fossil fuels. In any discussion about climate change, renewable energy usually tops the list of changes the world can implement to stave off the worst effects of rising temperatures. Primary energy sources take many forms, including nuclear energy, fossil energy like oil, coal and natural gas -- and renewable sources like wind, solar, geothermal and hydropower. The source of energy of the sun or stars is the nuclear fusion of light nuclei such as hydrogen present in their inner part at a very high temperature and a high pressure. This results the formation of helium nucleus with a release of tremendous amount of energy. Harnessing power from the wind is one of the cleanest and most sustainable ways to generate electricity as it produces no toxic pollution or global warming emissions. Wind is also abundant, inexhaustible, and affordable, which makes it a viable and large-scale alternative to fossil fuels. Solar radiation, or energy produced by the Sun, is the primary energy source for most processes in the Earth system and drives Earth's energy budget.