Greta is not a "messenger". She may be your Messiah, in your climate cult, but I live in reality and will not drink this Kool-Aid.
Nice how you say "...pumping a lot of greenhouse gas into the atmosphere...". Gee, that sounds really scary. Like pumping poison into an enclosed room with a lot of people in it. Give me a break. CO2 is not dangerous, nor is it an effective greenhouse gas. It is not even remotely plentiful.
Let all the gases in Earth's atmosphere be represented by 100 USD. I will give you an amount out of that $100 equal to the amount represented by CO2. Is it $40? Is it $20? Is it $10?
The answer is: 4 US pennies. Four pennies out of $100.00. In other words, $0.04 And that is what all this angst and fuss is about. Give me a break.
This climate cult has gone on long enough. Pretending that we are not part of the Earth and therefore not part of a natural cycle is absurd. Who is to say the CO2 emitted by us won't be beneficial, or recycled back into the Earth somehow? This climate hysteria needs to stop; it is ridiculous.
Do you realize how much all of this sounds like the Catholic Church in medieval times? Don't believe in Christ? Are you a "denier" of Christ? We will burn you at the stake for your heresy. Don't believe all of these Catholic priests that tell you there is a Christ? Shame on you for your ignorance.
P.S. Anyone resorting to the slur word "denier" has already lost any argument or debate about climate. There is no debate at that point, only a religious fervor on one side.