Human actions don't matter? Ffs, try to think with reason. So what if nature causes more greenhouse gasses than us. More the reason to not add excessively into it. Besides, if cows produce more greenhouse gasses, then wouldn't it be reasonable to get rid of them?
Think.
People "need" meat and milk from cows. Cows need pasture and food. Most of worlds crop production goes into growing meat. In order to get room for pasture and fields, forests must be cut down. Forests however are quite essential in dealing with greenhouse gasses. More cows -> less forests -> less resources to cope with co2.
Think.
Think about natural resources. Producing warm water takes resources. Electricity is quite essential, and so is the powerline network that transfers it. Electricity doesn't come cheap. Most of worlds energy is produced using mineral-based resources, oil, coal and uranium for example. What then when we run out of them? No oil to maintain the networks, no uranium to produce more electricity. Industry uses huge loads of more energy than "common people", but what stops us to try and change the fact? Companies have no choice is enough people force them to. How much energy goes to waste simply by leaving all the lights on in a factory or in a superstore 24/7. How much energy goes to waste when everybody always picks a new plastic bag when shopping instead of reusing.
Think.
Think about pollution. Producing energy causes vast amount of very damaging pollution. Sure, we can dig holes and sink the waste into those, but what happens when we run out of solid ground to dig on? What happens when those barrels corrode and start to leak into natural water resources? Factories produce huge amount of waste. Consuming more creates a demand. Demand creates more factories and production, which again creates more pollution.
Cars pollute. You can't deny that. Using car to travel to work every day, using car every second day (yeah, right, more likely every day too) to go shopping, using car at weekends to go boozing and generally driving around. You only waste your hard earned money to gasoline and also create enough emission to spoil another fine day.
If you think global warming is a hoax, then fine. Just don't deny the problems with running out of resources. Don't deny the problems with pollution.
May our rivers run clean once again. Someday, somewhere.
Yeah, right.