As an individual, how will any lifestyle alteration I make have any impact on climate change compared to the damage caused by livestock farming, population growth and fossil fuels etc?
Beyond that, what other action could I take? Were I to make a career change, which companies could I work for and make a measurable impact? Or would my time be better served in government?
However, convincing politicians can do much more...
By all means, look for big actions as well... but do the small stuff.
Eat local.
Drive less.
Walk more.
Plant a tree.