"Policy goals" won't be enough to protect bicyclists once the cars start driving themselves. Strong standards will be necessary to govern the interactions between cars and bikes in an autonomous future.
As coastal communities look for new ways to build resilience, they'll need to consider options such as the natural and hybrid systems compared in a new study by the National Oceanic and Atmospheric Administration.
A new study by NOAA scientists and colleagues shows a stunning reduction in vehicle-related air pollutants in the Los Angeles basin over the past several decades. Despite the gains, unhealthy air remains.