That is dead right...but not in the way he or 'the experts' mean. What he could have said, and been nearer the truth, were the words of Agent Smith during Morpheus' interrogation:
"The Earth has a fever, and the fever is rising. The experts have told us it is not a passing affliction that will heal by itself"... ..."We are what is wrong, and we must make it right."
So in a way Gore is right, WE are what is wrong. Of course he wants to cry doom and gloom over "the climate impacts that might lie ahead"; there are two ways of looking at this: (a) climate change will happen anyway so let's learn to deal with it and survive the changes as long as possible rather than try to stop it (because we can't) or (b) climate change may not happen and we can stop it...so...let's target the easiest and most efficient way we can by targeting the main reason, that worryingly clear reason is amply illustrated HERE; we must reduce the population/stop population growth. World population has doubled in about 40 years and tripled in less than 80...our parents lifetimes...quadrupled in the last century...whichever way you read it the figures are ominous...the planet can't/won't sustain much more.
"The only way you can survive is to spread to another area. There is another organism on this planet that follows the same pattern. Do you know what it is? A virus. Human beings are a disease, a cancer of this planet."
said Gore...but that truth, once known, is rather unpleasant and so are the various cures.
"In every land the truth, once known, has the power to set us free"