The US government is worried about "domestic disturbances" caused (for instance) by climate disasters or energy shortages, and spying on environmental activists seems to be part of its response — along with martial law.

As the Earth heats up, "disturbances" will happen by and by in many countries, including the US. (Food protests have happened in some countries in the past few years.) Rather than prevent them by curbing global heating, the US government plans to respond to them with repression.