4 links have been added on this idea.
  1. We can create net zero-carbon roads worldwide by planting trees along all highways and streets.

  2. Scientists have discovered an asphalt that can suck CO2 from the air, making it the perfect road surface material!
    https://www.sciencealert.com/cheap-asphalt-that-can-suck-up-carbon-dioxide-has-been-created