Like many conservatives, I was traditionally skeptical of the science supporting anthropogenic global warming. Today, I am skeptical no longer. Like conservative blogger D.R. Tucker, on this issue, I was ultimately "defeated by facts."
Religion also played a role:
As a practicing Roman Catholic, another critical element for me was the leading role being played by Pope Benedict XVI and the Catholic Church in articulating the moral imperative to address manmade global warming.
But in the end, he says,
my own reading and research made the following conclusions inescapable: today, there is no debate in the scientific community about whether the Earth is warming "” it is. There is also a nearly unanimous consensus that human activity is responsible for this warming. Given the foregoing, addressing climate change today is an ethical and moral imperative. Failing to do so is a repudiation of our responsibilities both to each other, and most particularly, to future generations. It is a breach of faith, trust, and duty, of enormous magnitude.
It'll be interesting to see if more conservatives follow suit.