Flat earth. No flat earth model can describe all properties of earth at one time. Most of the time it is adjusted or made up pseudoscience is implemented into it.
Pretty much any conspiracy theory can be debunked. You can also use 5G. Peak cases of corona virus were in countries with no 5G towers. 5G waves also don’t ionize atoms and can’t harm humans in any way besides negligible things like giving off small amounts of heat