The US government knows that radiation causes cancer and death and nuclear bombs, but they continue to mine uranium, allow nuke power plants, and build A-bombs and H-bombs.

The US government knows that smoking causes cancer and kills millions of people, yet they allow tobacco companies to sell cigarettes.

The US government knows that toxic chemicals cause cancer, yet they still allow corporate polluters to dump millions of pounds of these chemicals in the air are breath and water were drinking and food we eat.

Why do you think the government would't be producing greenhouses gases when they know they cause climate change? I hear the same ignorant and absurd claim made about elites flying in private jets: if climate change were real, the government wouldn't allow them to fly!

Your logic is more flawed than your climate denial. This is what happens to an under-educated brain marinated in conspiracy theories and assuming everything the government says is a lie.