Great Thunberg filed a lawsuit against five nations over their role in the climate crisis, but notably, the US, China and India, several of the world's biggest greenhouse gas emitters, were not among them. If she was serious about tackling the worst offenders, they would feature prominently in her rhetoric and legal proceedings.
Curiously, Brazil is among the five nations (the others are Argentina, Turkey, Germany and France), a country whose per capita emissions are half those of Thunberg's native Sweden. 
The choice of countries in the lawsuit seem almost arbitrary. Argentina, Turkey and Brazil are minnows in comparison to the high per-capita emitters like the US, and their Northern European counterparts. They have also adopted environmentally conscious policies far earlier in their development cycles. Turkey, for example, has reduced its greenhouse emissions by more than any other developed nation.
Of the five highest polluting nations on earth, only India's emissions are rising. Therefore, if reducing CO2 emissions was a priority for Greta, surely India would also play a prominent role in her legal efforts?
Alternatively, if she wants to go after the worst per capita offenders and persuade individuals to change their way of life, she would target nations like the US, Brunei, Australia, Saudi Arabia, the United Arab Emirates, Kuwait, Bahrain, and Qatar.
The fact that she doesn't go after either the worst emitting governments nor the individuals with the highest emissions could be indicative of an underlying political agenda.