Non-peer-reviewed manuscript falsely claims natural cloud changes can explain global warming

Their claims are based on a chain of reasoning with multiple flaws: (1) They claim that climate models cannot be relied upon but do not demonstrate this. (2) They instead make a new climate model (despite this being in contradiction of (1)).

There isn't one climate model that works all of the time. Seems like a poor place to start the argument.

Just stop with the alarmism. How many years do we have before the next doomsday date?

Human contribution to CO2 per year is a rounding error.