Grist: When the young people working with Our Childrens Trust talk about their lawsuits to compel governments to act on climate change, they like to use a quote attributed to Mahatma Gandhi: First they ignore you, then they laugh at you, then they fight you, then you win. This month, it looks like these young activists have made it to step three: On Nov. 12, three fossil-fuel lobby groups asked a judge to let them join the federal case as codefendants against the 21 children (and a climate scientist)...