Question

If the sun were growing bigger would that account for global warming?

Answer 1

Yes. As the Sun grows bigger, its luminosity will increase, so will heat energy from the Sun. The Earth's temperature will grow hotter and hotter.

Explanation:

The Sun cannot grow right now but astronomers have correctly predicted that the Sun increases its luminosity by 10% every 1 billion years. In about 5 billion years, the Earth will be burnt to a crisp. Rocks will melt and the atmosphere will be stripped off.