I thought that Trump and others joking about no more hamburgers and taking a train to Hawaii were gross exaggerations or misinterpretations, but AOC actually said that. Cow farts and airplane emmissions are part of greenhouse gasses and this comes from the GND FAQ:
"Yes, we are calling for a full transition off fossil fuels and zero greenhouse gasses."
And this, also from the FAQ, directly addresses airplanes and farting cows:
"We set a goal to get to net-zero, rather than zero emissions, in 10 years because we aren't sure that we will be able to fully get rid of farting cows and airplanes that fast."
AOC is comedy gold for Republicans and will Democrats in 2020.