In the past missionaries have traveled to far countries with the message of the gospel - with great hardship and often with the loss of life. In contrast we can reach millions instantly from the comfort of our homes by merely hitting the 'send' button on our computers or with iPads or phones.
Maybe more climate activists will think about the climate change not as an international problem to be resolved in an air-conditioned meeting hall but as a guerilla war to be fought in the streets.