Inaction will lead to climate change killing millions of humans. If someone won't consider eating vegetarian more often, switching to chicken is far better from an ethical standpoint than doing nothing.
Assuming switching to chicken reduces carbon by 12%, assuming carbon responsible for 250,000 death then meat consumption is responsible 30,000 ppl/year
Number of cows in u.s. 30,000,000 for 3% of global market
US market responsible for 900 deaths / year
140 chickens / cow(calorie wise)
estimated 20 years of life lost per death
18,000 QALY for 4.1 billion more chickens
Rough estimate of 2.3 minutes of human life gained per chicken raised
