I think the biggest pushback comes from people who perceive me to be a threat. Having bloggers who are dedicated to making up false information about you, having anonymous people write nasty emails and letters, having organizations file legal requests for your work-related emails, and all the other things that happen can be very depressing and discouraging.

My faith tells me that God does want people to understand climate change and do something about it.

The word "evangelist" means someone who spreads good news. Studying the impacts of climate change as I do, it's hard to come up with good news. In many ways I feel more like a Cassandra or a Jeremiah than a good-news evangelist.

We don't have a hundred years to fix climate change. We don't have a hundred years to wait until we've built all these bridges and rapport and scientific understanding and so on and so forth. We have to fix climate change with the people we have right now, and to a large extent with the perspectives we have right now as well.

Our carbon emissions have to eventually go to zero. We have to. Otherwise we're never going to have a stable climate and that's what our goal is for human civilization to thrive, a stable climate. We don't want one that's hotter, we don't want one that's colder, we want one that's stable.

It's a new normal and I really do think that global weirding is the best way to describe what we're seeing.

There is also a great deal of behind-the-scenes pressure from political funders too. And by funders I don't just mean the fossil fuel industry. Many of those exerting pressure on our society to ignore climate change, oppose climate change legislation, and shut down efforts to develop a clean energy economy are doing so out of ideology, not just economics. In the simplest terms, many large industries don't want the government telling them what to do with their businesses and they don't want any restrictions on what they can and cannot do, which includes polluting our shared environment.