Consensus regarding anthropogenic global warming is 99.84%; the consensus for evolution among scientists is at a very similar 99.9%. This is on a par with claiming those who believe the earth is flat are supporting a legitimate controversy, and that there is not general agreement on the shape of our planet among scientists. All three ideas where a non-existent controversy is asserted seem to come from those who are religious, right wing, and anti-government, and who are prone to conspiracy theories.
In other words, NOT people who should be taken seriously, and DEFINITELY not people who should be put in charge of anything relating to education, much less public education.
As with creationism, the opposition science is junk science, funded by groups and organizations with an axe to grind, with the aim clearly being to produce a pre-determined or 'rigged' outcome. That is not valid science, hence the term 'junk science'.
The reality is that 99.84% of scientists confirm there is global warming; and nearly as many confirm that we are causing it.
From James Lawrence Powell:
Consensus: 99.84% of Peer-Reviewed Articles Support the Idea of Global Warming
Scientists do not disagree about human-caused global warming. It is the ruling paradigm of climate science, in the same way that plate tectonics is the ruling paradigm of geology. We know that continents move. We know that the earth is warming and that human emissions of greenhouse gases are the primary cause. These are known facts about which virtually all publishing scientists agree.