Big oil companies, like ExxonMobil or Shell, deliberately covered up the truth about global warming. Their own research reveals they had known about the disastrous impact of their products for more than 40 years. Big Oil spent millions setting up and fueling a strategy of misinformation to wage war against science and hinder any policy of resilience to climate change. Today, dozens of complaints have been filed against them. This report investigates on a legal battle bound to go down in history.