How do you kill grass growing under tar?

To kill grass growing under tar, you can apply a non-selective herbicide containing glyphosate directly onto the grass, ensuring it thoroughly saturates the foliage. Alternatively, you can manually remove the grass by scraping it away, though this may be labor-intensive. Covering the area with a thick layer of mulch or cardboard can also smother the grass over time. Always follow safety guidelines when using chemicals and consider the environmental impact.