claim: When the exact same group of 'experts' who claimed it was global cooling in 1977 now claim it's global warming you can easily see why I am skeptical
evidence: Trend sceptics or deniers ( who deny there is global warming ), [ and ] argue that no significant climate warming is taking place at all, claiming that the warming trend measured by weather stations is an artefact due to urbanisation around those stations ( urban heat island effect ).