It depends.
The climate is indeed changing, it's not hard to see but that's something very normal. Our climate goes through different cycles all the time, some periods are warmer and some colder than regular. So yes the climate is changing.
However, there is no scientific proof that CO2 is causing our planet to warm up. Those are just assumptions at this moment. So it's not really a hoax but what the climate hippies are telling you is also not true. That's because most people don't think for themselves and believe everything they read in newspapers or hear from politicians without looking at the facts.
For instance they want us to use solar energy because it's supposed to be green but if they had studied the data they would have know that nuclear energy has the lowest CO2 emissions. It's also very bad for nature to recycle old solar panels when they stop working after 20 years.
Most people act emotional, they read online that the seawater is rising and start to freak out. But it's not because there is a correlation between climate change and CO2 emissions that the one is causing the other. We simply have not enough data to make a correct conclusion.