Why don't people know that Giant Sequoias live over 3000 years?

What about Redwoods?

They love CO2.

the USGS says that humans emit 73 to 248 times more CO2 than all volcanoes.

The longest living species of tree is the bristlecone pines.  We are lucky in California having the biggest (Sequoia), the tallest (Redwood) and the oldest (Bristlecone) and I have been to each and they are all really cool places to visit.  The tree rings from Bristlecone were really abused by Michael Mann.  Modern rings didn't paint the picture he wanted so Mann just cut off the inconvenient portion of the proxies (the modern portion) and pasted on measured temperature data.  That was the hockey stick.  Volcanoes typically happen when gases get trapped for a while and pressure builds up.  Volcanic explosions; therefore, only represent a portion of the gases released from volcanoes.   Anyway, the total emissions are therefore impossible to estimate with any certainty but volcanic emissions tend to be the best studied and they aren't as significant as logic might dictate.  Human emissions are actually much greater than volcanoes but we have only been emitting for a hundred years in any significant quantity and for only 50 in what might influence temperature in a measurable way.  Most of the CO2 in the atmosphere was emitted naturally before humans.  Humans can only be responsible for about a hundred ppmV of the 400 ppmV in the atmosphere.  The rest is natural.  

Right in the middle of the graph shows 79 AD eruption, during the Roman war period. Notice during the dark ages a greater eruption, Krakatoa, occurred during a cold cycle.

Alarmism fits an easily identifiable agenda.

The real goals are becoming more apparent: Nothing to do with "saving the planet".

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I really don't know if alarmists have cognitive dissonance, or if they are really uneducated.

The scientific facts are laid in front of them, but they try to refute them time and time again.