The Keystone XL—a 2000-mile stretch of pipeline that will carry oil from the tar sands of Alberta Canada through various parts of the US—will daily carry almost a million gallons of one of the world’s dirtiest fuels: tar sands oil. Tar sands extraction pollutes waterways, destroys forests, and threatens the health of the Native peoples from whose land the oil is extracted. The pipeline’s operation will also threaten public health, water systems, and, by drastically increasing climate-damaging emissions, our entire ecosystem. When it comes to reducing the greenhouse gasses that threaten to overwhelm our planet, corporations and the politicians in their pockets seem ready to override commonsense in favor of the short-term profit fix. That’s why it will take struggle to stop Keystone. Find out more about those struggles in the US and Canada, and what more will be needed to prevent Obama from going ahead with the pipeline.