John Oliver highlights environmental racism in Dallas

• "This is no coincidence," Oliver said.

Oliver explained that life expectancy in Joppa, a predominantly Black area, is just 71, while in Highland Park — where the population is mostly white — life expectancy is 84.

Zoom in: Then he told his audience about Shingle Mountain, the massive, toxic mound of old shingles built by Blue Star Recycling, which claimed it planned to recycle roofing shingles into asphalt.

• Oliver explained that even after activists finally got the shingles moved, they still ended up in a landfill just across the highway.

Go deeper: Watch the entire segment.