Indeed, a report from the United Nations has revealed that the livestock industry is the number-one contributor to global warming gasses - higher than even the transport industry. Plus, the effect of the livestock industry on our waterways and oceans is disastrous.

Because I am all too human, I don't always do the right thing, so how can I expect others to perform perfectly on the issues that are my top priority? I don't mean that we shouldn't try to do our best, but judgment and recrimination are such heavy weights. I find that accepting that we are all fallible lightens my load.

Caring for animals means caring for the environment they live in, and vice versa.

Animal rights is a serious subject, but I do my best to find humor where I can.

Animal rights is a serious subject, but I do my best to find humor where I can, and I have some great help: there are almost two hundred cartoons included in the book, including dozens from the brilliant Bizarro strip.

Some of us seem to be born with a drive to try to make the world kinder.

Some people feel that humans have a right to eat other animals but not to trash the earth. They may choose veganism because a vegan's ecological footprint is light, but once they are not invested in eating animals, they are more likely to be willing to learn the details of what happens to them. That learning will encourage compassionate people to stick with a plant-based diet.