Climate change deniers are those people who, no matter what the evidence there is, deny that the world is warming. These people are frankly idiotic, with the childish equivalent is 2 toddlers arguing over the colour of a building brick. Scientists all agree that the world is, on average, getting warmer – it is, your opinion is not relevant. Increasingly, this is belatedly understood. Now it is only extreme groups (like Prageru) can possibly continue to deny the fact that the world is warming. There are likely to remain fools who continue to deny that the world is warming – in the same way there are people who believe that the world is flat. We need to act now, we cant wait for 500 years more, for denialists to believe it.
The bigger concern is that many of these people are rapidly switching from climate denialism to climate doomers.
These people are almost worse. They are suggesting that, given we cannot change our behaviour, we just need to get used to hotter temperatures and all the impacts. Of course, these people often still deny the extent of change we might expect, but suggest that regardless, we should just get used to a hotter world, and work out how to live with it.
Both deniers and doomers are similarly dangerous; one suggests that climate change is not happening, the other states that it does not matter, as we cannot do anything about it anyway.